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301 vulnerabilities by Cesanta
CVE-2026-73259 (GCVE-0-2026-73259)
Vulnerability from nvd – Published: 2026-08-20 17:39 – Updated: 2026-08-20 19:51
VLAI
EPSS
VEX
Title
Mongoose: Reflected XSS via decoded URI in directory listing render
Summary
Mongoose is an embedded web server and network library. Prior to 7.22, a remote attacker can send a crafted percent-encoded request path to a deployment using MG_ENABLE_DIRLIST and persuade a user to visit it. The mg_http_serve_dir() and listdir() path in src/http.c places the decoded request URI into the title and h1 elements without HTML entity encoding. The resulting reflected cross-site scripting executes in the Mongoose origin and can expose session data or perform actions as the victim. This issue is fixed in version 7.22.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 19:50 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73258 (GCVE-0-2026-73258)
Vulnerability from nvd – Published: 2026-08-20 17:36 – Updated: 2026-08-20 18:32
VLAI
EPSS
VEX
Title
Mongoose: Multipart boundary/header scan logic error in mg_http_next_multipart
Summary
Mongoose is an embedded web server and network library. Prior to 7.22, a remote attacker can place a lone carriage return or line feed in multipart input processed by mg_http_next_multipart() in src/http.c. The loops comparing s[b] and s[b + 1], and s[h2] and s[h2 + 1], use an incorrect AND condition and stop when either character resembles part of a CRLF terminator. This truncates headers, filenames, or boundaries and can cause an application to accept dangerous content after seeing a misleading Content-Type value. This issue is fixed in version 7.22.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 18:32 UTC
CWE
- CWE-697 - Incorrect Comparison
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73257 (GCVE-0-2026-73257)
Vulnerability from nvd – Published: 2026-08-20 17:30 – Updated: 2026-08-20 19:34
VLAI
EPSS
VEX
Title
Mongoose: Content-Length + Transfer-Encoding coexistence enables request smuggling
Summary
Mongoose is an embedded web server and network library. Priro to version 7.22, a remote unauthenticated attacker can send an HTTP request containing both Content-Length and Transfer-Encoding: chunked. The cl_count and te_count checks in the mg_http_parse() and http_cb() paths in src/http.c accept both headers and prioritize chunked encoding, while a Content-Length-preferring reverse proxy can use a different request boundary. This CL.TE desynchronization can inject requests that access or modify resources in another user context. This issue is fixed in version 7.22.
Severity
9.1 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 19:34 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73256 (GCVE-0-2026-73256)
Vulnerability from nvd – Published: 2026-08-20 17:37 – Updated: 2026-08-21 21:46
VLAI
EPSS
VEX
Title
Mongoose: HTTP/1.0 detection off-by-one enables request smuggling via chunked TE
Summary
Mongoose is an embedded web server and network library. Prior to 7.22, a remote unauthenticated attacker can exploit an HTTP/1.0 reverse-proxy deployment by sending a request with Transfer-Encoding: chunked and conflicting framing. The http_cb() function in src/http.c tests hm.proto.len with an impossible greater-than-eight condition even though mg_http_parse() requires an eight-byte protocol string, so is_http_1_0 is never set. Mongoose consequently processes chunked encoding that an HTTP/1.0 proxy can ignore, enabling request smuggling and unauthorized access or state changes. This issue is fixed in version 7.22.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 21:10 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73255 (GCVE-0-2026-73255)
Vulnerability from nvd – Published: 2026-08-20 17:40 – Updated: 2026-08-25 15:09
VLAI
EPSS
VEX
Title
Mongoose: Path traversal in SSI #include directives enables arbitrary file read
Summary
Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can control an SSI-enabled file can place directory traversal sequences in an #include file or #include virtual directive. The mg_ssi() function in src/ssi.c concatenates the directive argument into a filesystem path without calling mg_path_is_sane(), allowing an MG_ENABLE_SSI deployment with ssi_pattern configured to disclose files readable by the Mongoose process. This issue is fixed in version 7.22.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:09 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
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CVE-2026-73254 (GCVE-0-2026-73254)
Vulnerability from nvd – Published: 2026-08-20 17:37 – Updated: 2026-08-21 16:22
VLAI
EPSS
VEX
Title
Mongoose: Stored XSS via unescaped filenames in directory listing
Summary
Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can create a file with an HTML payload in its name can trigger stored cross-site scripting when a user browses a directory served with MG_ENABLE_DIRLIST. The printdirentry() path called by listdir() in src/http.c URL-encodes the href but inserts the raw filesystem filename into the HTML link text. The browser executes the injected markup in the Mongoose origin, which can expose session data or permit actions as the victim. This issue is fixed in version 7.22.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 16:21 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73253 (GCVE-0-2026-73253)
Vulnerability from nvd – Published: 2026-08-20 17:41 – Updated: 2026-08-20 18:36
VLAI
EPSS
VEX
Title
Mongoose: TLS Hostname Verification Bypass via Overly Permissive Wildcard Matching
Summary
Mongoose is an embedded web server and network library. Prior to version 7.22, an on-path network attacker with a wildcard certificate for a parent domain can impersonate deeper subdomains to a client using the built-in TLS stack. The mg_tls_verify_cert_san() and mg_tls_verify_cert_cn() functions in src/tls_builtin.c call mg_match(), whose wildcard can cross DNS label boundaries, so a pattern such as *.example.com can match foo.bar.example.com. The resulting hostname verification bypass permits interception and modification of TLS traffic. This issue is fixed in version 7.22.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 18:33 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73251 (GCVE-0-2026-73251)
Vulnerability from nvd – Published: 2026-08-20 17:34 – Updated: 2026-08-20 19:50
VLAI
EPSS
VEX
Title
Mongoose Built-in TLS: CA-bundle certificate chain accepted without any signature verification
Summary
Mongoose is an embedded web server and network library. Prior to 7.23, a network attacker can impersonate a TLS server to a Mongoose client configured with a multi-certificate CA bundle. In src/tls_builtin.c, the mg_tls_init() function stores the bundle in tls->ca_bundle_der while tls->ca_der.len remains zero, and mg_tls_recv_cert() uses tls_bundle_find() to accept a Common Name match without calling mg_tls_verify_cert_signature(). A forged self-signed certificate can therefore satisfy hostname and CertificateVerify checks and enable interception, credential disclosure, traffic modification, and malicious responses. This issue is fixed in version 7.23.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 19:50 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/commit/2988bc… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.23 | x_refsource_MISC |
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CVE-2026-11404 (GCVE-0-2026-11404)
Vulnerability from nvd – Published: 2026-07-09 15:13 – Updated: 2026-07-28 01:48
VLAI
EPSS
VEX
Title
Cesanta Mongoose Out-of-Bounds Read in MG_TLS_BUILTIN ClientHello Session ID Parsing
Summary
Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function mg_tls_server_recv_hello(), which uses an attacker-controlled session_id_len byte from a TLS ClientHello as a buffer index without validating it against the length of received data. A remote, unauthenticated attacker can send a single crafted ClientHello with an oversized session id length to read past the receive buffer, crashing any HTTPS, MQTTS, or WSS service built on MG_TLS_BUILTIN.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 16:09 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/releases/tag/7.22 | patchrelease-notes |
| https://github.com/cesanta/mongoose | product |
Impacted products
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CVE-2026-6986 (GCVE-0-2026-6986)
Vulnerability from nvd – Published: 2026-04-25 16:30 – Updated: 2026-04-27 13:36 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose GCM Authentication Tag tls_aes128.c mg_aes_gcm_decrypt signature verification
Summary
A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This issue affects the function mg_aes_gcm_decrypt of the file /src/tls_aes128.c of the component GCM Authentication Tag Handler. Such manipulation leads to improper verification of cryptographic signature. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is assessed as difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 7.21 is capable of addressing this issue. It is advisable to upgrade the affected component. VulDB has contacted the vendor early and they confirmed quickly, that this issue got fixed already.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 13:33 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/359529 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/359529/cti | signaturepermissions-required |
| https://vuldb.com/submit/796231 | third-party-advisory |
| https://github.com/dwBruijn/CVEs/blob/main/Mongoo… | exploit |
| https://github.com/cesanta/mongoose/releases/tag/7.21 | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 Unaffected: 7.21 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2026-6985 (GCVE-0-2026-6985)
Vulnerability from nvd – Published: 2026-04-25 16:15 – Updated: 2026-04-27 12:35 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose TCP Option net_builtin.c handle_opt infinite loop
Summary
A weakness has been identified in Cesanta Mongoose up to 7.20. This vulnerability affects the function handle_opt of the file /src/net_builtin.c of the component TCP Option Handler. This manipulation of the argument optlen causes infinite loop. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 7.21 is able to resolve this issue. Upgrading the affected component is advised. VulDB has contacted the vendor early and they confirmed quickly, that this issue got fixed already.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 12:35 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/359528 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/359528/cti | signaturepermissions-required |
| https://vuldb.com/submit/796230 | third-party-advisory |
| https://github.com/dwBruijn/CVEs/blob/main/Mongoo… | exploit |
| https://github.com/cesanta/mongoose/releases/tag/7.21 | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 Unaffected: 7.21 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2026-5246 (GCVE-0-2026-5246)
Vulnerability from nvd – Published: 2026-04-02 09:45 – Updated: 2026-04-02 13:07 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose P-384 Public Key mongoose.c mg_tls_verify_cert_signature authorization
Summary
A vulnerability was determined in Cesanta Mongoose up to 7.20. Affected is the function mg_tls_verify_cert_signature of the file mongoose.c of the component P-384 Public Key Handler. Executing a manipulation can lead to authorization bypass. The attack can be executed remotely. Attacks of this nature are highly complex. The exploitability is told to be difficult. The exploit has been publicly disclosed and may be utilized. Upgrading to version 7.21 is able to address this issue. This patch is called 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 13:06 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/354827 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/354827/cti | signaturepermissions-required |
| https://vuldb.com/submit/770104 | third-party-advisory |
| https://github.com/cesanta/mongoose/commit/0d882f… | patch |
| https://github.com/cesanta/mongoose/releases/tag/7.21 | patch |
| https://github.com/cesanta/mongoose/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 Unaffected: 7.21 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2026-5245 (GCVE-0-2026-5245)
Vulnerability from nvd – Published: 2026-04-02 09:00 – Updated: 2026-04-02 14:27 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose mDNS Record mongoose.c handle_mdns_record stack-based overflow
Summary
A vulnerability was found in Cesanta Mongoose up to 7.20. This impacts the function handle_mdns_record of the file mongoose.c of the component mDNS Record Handler. Performing a manipulation of the argument buf results in stack-based buffer overflow. Remote exploitation of the attack is possible. A high degree of complexity is needed for the attack. The exploitability is said to be difficult. The exploit has been made public and could be used. Upgrading to version 7.21 will fix this issue. The patch is named 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 14:27 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/354826 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/354826/cti | signaturepermissions-required |
| https://vuldb.com/submit/770103 | third-party-advisory |
| https://github.com/cesanta/mongoose/commit/0d882f… | patch |
| https://github.com/cesanta/mongoose/releases/tag/7.21 | patch |
| https://github.com/cesanta/mongoose/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 Unaffected: 7.21 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2026-5244 (GCVE-0-2026-5244)
Vulnerability from nvd – Published: 2026-04-02 08:00 – Updated: 2026-04-02 13:31 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose TLS 1.3 mongoose.c mg_tls_recv_cert heap-based overflow
Summary
A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mg_tls_recv_cert of the file mongoose.c of the component TLS 1.3 Handler. Such manipulation of the argument pubkey leads to heap-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 7.21 mitigates this issue. The name of the patch is 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 13:22 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/354825 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/354825/cti | signaturepermissions-required |
| https://vuldb.com/submit/770063 | third-party-advisory |
| https://github.com/cesanta/mongoose/commit/0d882f… | patch |
| https://github.com/cesanta/mongoose/releases/tag/7.21 | patch |
| https://github.com/cesanta/mongoose/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 Unaffected: 7.21 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2018-25193 (GCVE-0-2018-25193)
Vulnerability from nvd – Published: 2026-03-06 12:19 – Updated: 2026-07-15 01:23
VLAI
EPSS
VEX
Title
Mongoose Web Server 6.9 Denial of Service via Socket Connection
Summary
Mongoose Web Server 6.9 contains a denial of service vulnerability that allows remote attackers to crash the service by establishing multiple socket connections. Attackers can repeatedly create connections to the default port and send malformed data to exhaust server resources and cause service unavailability.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-09 18:04 UTC
CWE
- CWE-1188 - Initialization of a Resource with an Insecure Default
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/45819 | exploit |
| https://www.vulncheck.com/advisories/mongoose-web… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose Web Server |
Affected:
6.9
cpe:2.3:a:cesanta:mongoose:6.9:*:*:*:*:*:*:* |
Date Public
2018-11-11 12:00
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CVE-2026-73253 (GCVE-0-2026-73253)
Vulnerability from cvelistv5 – Published: 2026-08-20 17:41 – Updated: 2026-08-20 18:36
VLAI
EPSS
VEX
Title
Mongoose: TLS Hostname Verification Bypass via Overly Permissive Wildcard Matching
Summary
Mongoose is an embedded web server and network library. Prior to version 7.22, an on-path network attacker with a wildcard certificate for a parent domain can impersonate deeper subdomains to a client using the built-in TLS stack. The mg_tls_verify_cert_san() and mg_tls_verify_cert_cn() functions in src/tls_builtin.c call mg_match(), whose wildcard can cross DNS label boundaries, so a pattern such as *.example.com can match foo.bar.example.com. The resulting hostname verification bypass permits interception and modification of TLS traffic. This issue is fixed in version 7.22.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 18:33 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73255 (GCVE-0-2026-73255)
Vulnerability from cvelistv5 – Published: 2026-08-20 17:40 – Updated: 2026-08-25 15:09
VLAI
EPSS
VEX
Title
Mongoose: Path traversal in SSI #include directives enables arbitrary file read
Summary
Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can control an SSI-enabled file can place directory traversal sequences in an #include file or #include virtual directive. The mg_ssi() function in src/ssi.c concatenates the directive argument into a filesystem path without calling mg_path_is_sane(), allowing an MG_ENABLE_SSI deployment with ssi_pattern configured to disclose files readable by the Mongoose process. This issue is fixed in version 7.22.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:09 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
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CVE-2026-73259 (GCVE-0-2026-73259)
Vulnerability from cvelistv5 – Published: 2026-08-20 17:39 – Updated: 2026-08-20 19:51
VLAI
EPSS
VEX
Title
Mongoose: Reflected XSS via decoded URI in directory listing render
Summary
Mongoose is an embedded web server and network library. Prior to 7.22, a remote attacker can send a crafted percent-encoded request path to a deployment using MG_ENABLE_DIRLIST and persuade a user to visit it. The mg_http_serve_dir() and listdir() path in src/http.c places the decoded request URI into the title and h1 elements without HTML entity encoding. The resulting reflected cross-site scripting executes in the Mongoose origin and can expose session data or perform actions as the victim. This issue is fixed in version 7.22.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 19:50 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73256 (GCVE-0-2026-73256)
Vulnerability from cvelistv5 – Published: 2026-08-20 17:37 – Updated: 2026-08-21 21:46
VLAI
EPSS
VEX
Title
Mongoose: HTTP/1.0 detection off-by-one enables request smuggling via chunked TE
Summary
Mongoose is an embedded web server and network library. Prior to 7.22, a remote unauthenticated attacker can exploit an HTTP/1.0 reverse-proxy deployment by sending a request with Transfer-Encoding: chunked and conflicting framing. The http_cb() function in src/http.c tests hm.proto.len with an impossible greater-than-eight condition even though mg_http_parse() requires an eight-byte protocol string, so is_http_1_0 is never set. Mongoose consequently processes chunked encoding that an HTTP/1.0 proxy can ignore, enabling request smuggling and unauthorized access or state changes. This issue is fixed in version 7.22.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 21:10 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73254 (GCVE-0-2026-73254)
Vulnerability from cvelistv5 – Published: 2026-08-20 17:37 – Updated: 2026-08-21 16:22
VLAI
EPSS
VEX
Title
Mongoose: Stored XSS via unescaped filenames in directory listing
Summary
Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can create a file with an HTML payload in its name can trigger stored cross-site scripting when a user browses a directory served with MG_ENABLE_DIRLIST. The printdirentry() path called by listdir() in src/http.c URL-encodes the href but inserts the raw filesystem filename into the HTML link text. The browser executes the injected markup in the Mongoose origin, which can expose session data or permit actions as the victim. This issue is fixed in version 7.22.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 16:21 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73258 (GCVE-0-2026-73258)
Vulnerability from cvelistv5 – Published: 2026-08-20 17:36 – Updated: 2026-08-20 18:32
VLAI
EPSS
VEX
Title
Mongoose: Multipart boundary/header scan logic error in mg_http_next_multipart
Summary
Mongoose is an embedded web server and network library. Prior to 7.22, a remote attacker can place a lone carriage return or line feed in multipart input processed by mg_http_next_multipart() in src/http.c. The loops comparing s[b] and s[b + 1], and s[h2] and s[h2 + 1], use an incorrect AND condition and stop when either character resembles part of a CRLF terminator. This truncates headers, filenames, or boundaries and can cause an application to accept dangerous content after seeing a misleading Content-Type value. This issue is fixed in version 7.22.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 18:32 UTC
CWE
- CWE-697 - Incorrect Comparison
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-73251 (GCVE-0-2026-73251)
Vulnerability from cvelistv5 – Published: 2026-08-20 17:34 – Updated: 2026-08-20 19:50
VLAI
EPSS
VEX
Title
Mongoose Built-in TLS: CA-bundle certificate chain accepted without any signature verification
Summary
Mongoose is an embedded web server and network library. Prior to 7.23, a network attacker can impersonate a TLS server to a Mongoose client configured with a multi-certificate CA bundle. In src/tls_builtin.c, the mg_tls_init() function stores the bundle in tls->ca_bundle_der while tls->ca_der.len remains zero, and mg_tls_recv_cert() uses tls_bundle_find() to accept a Common Name match without calling mg_tls_verify_cert_signature(). A forged self-signed certificate can therefore satisfy hostname and CertificateVerify checks and enable interception, credential disclosure, traffic modification, and malicious responses. This issue is fixed in version 7.23.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 19:50 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/commit/2988bc… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.23 | x_refsource_MISC |
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CVE-2026-73257 (GCVE-0-2026-73257)
Vulnerability from cvelistv5 – Published: 2026-08-20 17:30 – Updated: 2026-08-20 19:34
VLAI
EPSS
VEX
Title
Mongoose: Content-Length + Transfer-Encoding coexistence enables request smuggling
Summary
Mongoose is an embedded web server and network library. Priro to version 7.22, a remote unauthenticated attacker can send an HTTP request containing both Content-Length and Transfer-Encoding: chunked. The cl_count and te_count checks in the mg_http_parse() and http_cb() paths in src/http.c accept both headers and prioritize chunked encoding, while a Content-Length-preferring reverse proxy can use a different request boundary. This CL.TE desynchronization can inject requests that access or modify resources in another user context. This issue is fixed in version 7.22.
Severity
9.1 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 19:34 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/security/advi… | x_refsource_CONFIRM |
| https://github.com/cesanta/mongoose/pull/3611 | x_refsource_MISC |
| https://github.com/cesanta/mongoose/commit/a9df52… | x_refsource_MISC |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | x_refsource_MISC |
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CVE-2026-11404 (GCVE-0-2026-11404)
Vulnerability from cvelistv5 – Published: 2026-07-09 15:13 – Updated: 2026-07-28 01:48
VLAI
EPSS
VEX
Title
Cesanta Mongoose Out-of-Bounds Read in MG_TLS_BUILTIN ClientHello Session ID Parsing
Summary
Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function mg_tls_server_recv_hello(), which uses an attacker-controlled session_id_len byte from a TLS ClientHello as a buffer index without validating it against the length of received data. A remote, unauthenticated attacker can send a single crafted ClientHello with an oversized session id length to read past the receive buffer, crashing any HTTPS, MQTTS, or WSS service built on MG_TLS_BUILTIN.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 16:09 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cesanta/mongoose/releases/tag/7.22 | patchrelease-notes |
| https://github.com/cesanta/mongoose | product |
Impacted products
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CVE-2026-6986 (GCVE-0-2026-6986)
Vulnerability from cvelistv5 – Published: 2026-04-25 16:30 – Updated: 2026-04-27 13:36 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose GCM Authentication Tag tls_aes128.c mg_aes_gcm_decrypt signature verification
Summary
A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This issue affects the function mg_aes_gcm_decrypt of the file /src/tls_aes128.c of the component GCM Authentication Tag Handler. Such manipulation leads to improper verification of cryptographic signature. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is assessed as difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 7.21 is capable of addressing this issue. It is advisable to upgrade the affected component. VulDB has contacted the vendor early and they confirmed quickly, that this issue got fixed already.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 13:33 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/359529 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/359529/cti | signaturepermissions-required |
| https://vuldb.com/submit/796231 | third-party-advisory |
| https://github.com/dwBruijn/CVEs/blob/main/Mongoo… | exploit |
| https://github.com/cesanta/mongoose/releases/tag/7.21 | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 Unaffected: 7.21 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2026-6985 (GCVE-0-2026-6985)
Vulnerability from cvelistv5 – Published: 2026-04-25 16:15 – Updated: 2026-04-27 12:35 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose TCP Option net_builtin.c handle_opt infinite loop
Summary
A weakness has been identified in Cesanta Mongoose up to 7.20. This vulnerability affects the function handle_opt of the file /src/net_builtin.c of the component TCP Option Handler. This manipulation of the argument optlen causes infinite loop. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 7.21 is able to resolve this issue. Upgrading the affected component is advised. VulDB has contacted the vendor early and they confirmed quickly, that this issue got fixed already.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 12:35 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/359528 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/359528/cti | signaturepermissions-required |
| https://vuldb.com/submit/796230 | third-party-advisory |
| https://github.com/dwBruijn/CVEs/blob/main/Mongoo… | exploit |
| https://github.com/cesanta/mongoose/releases/tag/7.21 | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 Unaffected: 7.21 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2026-5246 (GCVE-0-2026-5246)
Vulnerability from cvelistv5 – Published: 2026-04-02 09:45 – Updated: 2026-04-02 13:07 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose P-384 Public Key mongoose.c mg_tls_verify_cert_signature authorization
Summary
A vulnerability was determined in Cesanta Mongoose up to 7.20. Affected is the function mg_tls_verify_cert_signature of the file mongoose.c of the component P-384 Public Key Handler. Executing a manipulation can lead to authorization bypass. The attack can be executed remotely. Attacks of this nature are highly complex. The exploitability is told to be difficult. The exploit has been publicly disclosed and may be utilized. Upgrading to version 7.21 is able to address this issue. This patch is called 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 13:06 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/354827 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/354827/cti | signaturepermissions-required |
| https://vuldb.com/submit/770104 | third-party-advisory |
| https://github.com/cesanta/mongoose/commit/0d882f… | patch |
| https://github.com/cesanta/mongoose/releases/tag/7.21 | patch |
| https://github.com/cesanta/mongoose/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 Unaffected: 7.21 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2026-5245 (GCVE-0-2026-5245)
Vulnerability from cvelistv5 – Published: 2026-04-02 09:00 – Updated: 2026-04-02 14:27 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose mDNS Record mongoose.c handle_mdns_record stack-based overflow
Summary
A vulnerability was found in Cesanta Mongoose up to 7.20. This impacts the function handle_mdns_record of the file mongoose.c of the component mDNS Record Handler. Performing a manipulation of the argument buf results in stack-based buffer overflow. Remote exploitation of the attack is possible. A high degree of complexity is needed for the attack. The exploitability is said to be difficult. The exploit has been made public and could be used. Upgrading to version 7.21 will fix this issue. The patch is named 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 14:27 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/354826 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/354826/cti | signaturepermissions-required |
| https://vuldb.com/submit/770103 | third-party-advisory |
| https://github.com/cesanta/mongoose/commit/0d882f… | patch |
| https://github.com/cesanta/mongoose/releases/tag/7.21 | patch |
| https://github.com/cesanta/mongoose/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 Unaffected: 7.21 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2026-5244 (GCVE-0-2026-5244)
Vulnerability from cvelistv5 – Published: 2026-04-02 08:00 – Updated: 2026-04-02 13:31 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose TLS 1.3 mongoose.c mg_tls_recv_cert heap-based overflow
Summary
A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mg_tls_recv_cert of the file mongoose.c of the component TLS 1.3 Handler. Such manipulation of the argument pubkey leads to heap-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 7.21 mitigates this issue. The name of the patch is 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 13:22 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/354825 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/354825/cti | signaturepermissions-required |
| https://vuldb.com/submit/770063 | third-party-advisory |
| https://github.com/cesanta/mongoose/commit/0d882f… | patch |
| https://github.com/cesanta/mongoose/releases/tag/7.21 | patch |
| https://github.com/cesanta/mongoose/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 Unaffected: 7.21 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2018-25193 (GCVE-0-2018-25193)
Vulnerability from cvelistv5 – Published: 2026-03-06 12:19 – Updated: 2026-07-15 01:23
VLAI
EPSS
VEX
Title
Mongoose Web Server 6.9 Denial of Service via Socket Connection
Summary
Mongoose Web Server 6.9 contains a denial of service vulnerability that allows remote attackers to crash the service by establishing multiple socket connections. Attackers can repeatedly create connections to the default port and send malformed data to exhaust server resources and cause service unavailability.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-09 18:04 UTC
CWE
- CWE-1188 - Initialization of a Resource with an Insecure Default
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/45819 | exploit |
| https://www.vulncheck.com/advisories/mongoose-web… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose Web Server |
Affected:
6.9
cpe:2.3:a:cesanta:mongoose:6.9:*:*:*:*:*:*:* |
Date Public
2018-11-11 12:00
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{
"name": "VulnCheck Advisory: Mongoose Web Server 6.9 Denial of Service via Socket Connection",
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