Common Weakness Enumeration
CWE-940
AllowedImproper Verification of Source of a Communication Channel
Abstraction: Base · Status: Incomplete
The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin.
102 vulnerabilities reference this CWE, most recent first.
CVE-2026-44894 (GCVE-0-2026-44894)
Vulnerability from cvelistv5 – Published: 2026-06-12 14:06 – Updated: 2026-07-15 00:53
VLAI
EPSS
VEX
Title
Netty's Default QUIC token handler accepts any client-supplied token
Summary
Netty is a network application framework for development of protocol servers and clients. NoQuicTokenHandler is the tokenHandler used when the application does not set one. Prior to version 4.2.15.Final, its writeToken() returns false (server will not send Retry — acceptable), but validateToken() unconditionally `return 0`. In QuicheQuicServerCodec.handlePacket(), a non-negative return from validateToken() is interpreted as 'token is valid, ODCID starts at offset 0', causing the server to call quiche_accept as if the client's address had been validated by a Retry round-trip. Per RFC 9000 §8.1, a validated address lifts the 3× anti-amplification send limit. Thus any attacker who includes ANY non-empty token bytes in an Initial packet — with a spoofed victim source IP — causes the Netty server to treat the victim as validated and reflect full-size handshake flights (certificates, etc.) toward it without the 3× cap. The correct 'no token handler' semantics would be to return -1 (invalid) so the normal un-validated path and amplification limit apply. Version 4.2.15.Final patches the issue.
Severity
7.5 (High)
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-13 03:03 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
| https://access.redhat.com/security/cve/CVE-2026-44894 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2488380 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| netty | netty |
Affected:
>= 4.2.0.Final, < 4.2.15.Final
|
|
| Red Hat | Red Hat build of Apache Camel - HawtIO 4 |
cpe:/a:redhat:apache_camel_hawtio:4
|
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CVE-2026-44698 (GCVE-0-2026-44698)
Vulnerability from cvelistv5 – Published: 2026-05-29 13:32 – Updated: 2026-05-29 13:58
VLAI
EPSS
VEX
Title
Home Assistant: Cross-origin iframe access token exfiltration via WebView JS bridge callback injection
Summary
Home Assistant is open source home automation software that puts local control and privacy first. Prior to 2026.4.1 for iOS and 2026.4.4 for Android, he Home Assistant Companion apps for Android and iOS expose a JavaScript bridge to the in-app WebView window.externalApp on Android and webkit.messageHandlers.getExternalAuth (alongside revokeExternalAuth and externalBus) on iOS. Two flaws expose the bridge to all frames (including cross-origin iframes) and unsanitized interpolation of the JavaScript callback identifier allows a cross-origin iframe rendered inside the Companion app to execute arbitrary JavaScript in the Home Assistant frontend's main-frame origin and exfiltrate the signed-in user's access token. This vulnerability is fixed in 2026.4.1 for iOS and 2026.4.4 for Android.
Severity
8.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-29 13:58 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/home-assistant/core/security/a… | x_refsource_CONFIRM |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| home-assistant | core |
Affected:
< 2026.4.4
|
|
| Home Assistant | Companion app (iOS) |
Affected:
< 2026.4.1
|
|
| Home Assistant | Companion app (Android) |
Affected:
< 2026.4.4
|
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CVE-2026-43880 (GCVE-0-2026-43880)
Vulnerability from cvelistv5 – Published: 2026-05-11 20:37 – Updated: 2026-05-12 12:55
VLAI
EPSS
VEX
Title
WWBN AVideo: Unauthenticated Arbitrary Email Sending via sendEmail.json.php Allows Phishing from Site's Legitimate From Address
Summary
WWBN AVideo is an open source video platform. In versions up to and including 29.0, objects/sendEmail.json.php exposes two branches depending on whether contactForm=1 is submitted. When the parameter is omitted, the endpoint sets $sendTo to an attacker-supplied email and, for unauthenticated callers, uses the site's own contact email as the message From:/Reply-To:. The endpoint is explicitly allow-listed as a "public write action" in objects/functionsSecurity.php (line 885), so it requires no authentication or CSRF token. An unauthenticated attacker (solving a captcha) can force the site's own SMTP infrastructure to send attacker-composed emails to arbitrary recipients with the site's legitimate sender address, passing SPF/DKIM/DMARC for the site's domain — ideal for targeted phishing and brand impersonation. Commit 4e3709895857a5857f0edb46b0ee984de0d9e1a2 contains an updated fix.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-12 12:55 UTC
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/WWBN/AVideo/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/WWBN/AVideo/commit/4e370989585… | x_refsource_MISC |
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CVE-2026-40434 (GCVE-0-2026-40434)
Vulnerability from cvelistv5 – Published: 2026-04-17 19:49 – Updated: 2026-04-17 20:28
VLAI
EPSS
VEX
Title
Anviz CrossChex Standard Improper Verification of Source of a Communication Channel
Summary
Anviz CrossChex Standard
lacks source verification in the client/server channel, enabling TCP
packet injection by an attacker on the same network to alter or disrupt
application traffic.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-17 20:27 UTC
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Anviz | Anviz CrossChex Standard |
Affected:
All versions
|
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CVE-2026-35643 (GCVE-0-2026-35643)
Vulnerability from cvelistv5 – Published: 2026-04-10 16:03 – Updated: 2026-06-23 16:16 X_Open Source
VLAI
EPSS
VEX
Title
OpenClaw < 2026.3.22 - Arbitrary Code Execution via Unvalidated WebView JavascriptInterface
Summary
OpenClaw before 2026.3.22 contains an unvalidated WebView JavascriptInterface vulnerability allowing attackers to inject arbitrary instructions. Untrusted pages can invoke the canvas bridge to execute malicious code within the Android application context.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-14 14:53 UTC
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/openclaw/openclaw/security/adv… | vendor-advisory |
| https://github.com/openclaw/openclaw/commit/630f1… | patch |
| https://github.com/openclaw/openclaw/commit/8b02e… | patch |
| https://www.vulncheck.com/advisories/openclaw-arb… | third-party-advisory |
Impacted products
Date Public
2026-03-24 00:00
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CVE-2026-33875 (GCVE-0-2026-33875)
Vulnerability from cvelistv5 – Published: 2026-03-27 20:25 – Updated: 2026-04-03 15:21
VLAI
EPSS
VEX
Title
Authenticator Vulnerable to Authentication Flow Hijack
Summary
Gematik Authenticator securely authenticates users for login to digital health applications. Versions prior to 4.16.0 are vulnerable to authentication flow hijacking, potentially allowing attackers to authenticate with the identities of victim users who click on a malicious deep link. Update Gematik Authenticator to version 4.16.0 or greater to receive a patch. There are no known workarounds.
Severity
9.3 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-30 18:57 UTC
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gematik/app-Authenticator/secu… | x_refsource_CONFIRM |
| https://www.machinespirits.com/advisory/f41e56/ |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gematik | app-Authenticator |
Affected:
< 4.16.0
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CVE-2026-22269 (GCVE-0-2026-22269)
Vulnerability from cvelistv5 – Published: 2026-02-19 09:00 – Updated: 2026-02-20 16:09
VLAI
EPSS
VEX
Summary
Dell PowerProtect Data Manager, version(s) prior to 19.22, contain(s) an Improper Verification of Source of a Communication Channel vulnerability in the REST API. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to protection mechanism bypass.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-20 16:09 UTC
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00042977… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | PowerProtect Data Manager |
Affected:
N/A , < 19.22.0-24 or later
(semver)
|
Date Public
2026-02-17 18:30
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CVE-2026-2967 (GCVE-0-2026-2967)
Vulnerability from cvelistv5 – Published: 2026-02-23 02:32 – Updated: 2026-02-23 13:32 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose TCP Sequence Number net_builtin.c getpeer verification of source
Summary
A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-23 13:32 UTC
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.347334 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.347334 | signaturepermissions-required |
| https://vuldb.com/?submit.755450 | third-party-advisory |
| https://github.com/dwBruijn/CVEs/blob/main/Mongoo… | related |
| https://github.com/dwBruijn/CVEs/blob/main/Mongoo… | exploit |
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 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2025-62439 (GCVE-0-2025-62439)
Vulnerability from cvelistv5 – Published: 2026-02-10 15:39 – Updated: 2026-05-12 12:08
VLAI
EPSS
VEX
Summary
An Improper Verification of Source of a Communication Channel vulnerability [CWE-940] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions may allow an authenticated user with knowledge of FSSO policy configurations to gain unauthorized access to protected network resources via crafted requests.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-11 14:57 UTC
CWE
- CWE-940 - Improper access control
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Fortinet | FortiOS |
Affected:
7.6.0 , ≤ 7.6.4
(semver)
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|
| Siemens | RUGGEDCOM APE1808 |
Affected:
0 , < *
(custom)
|
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CVE-2025-61932 (GCVE-0-2025-61932)
Vulnerability from cvelistv5 – Published: 2025-10-20 07:25 – Updated: 2026-02-26 16:57
VLAI
EPSS
VEX
Summary
Lanscope Endpoint Manager (On-Premises) (Client program (MR) and Detection agent (DA)) improperly verifies the origin of incoming requests, allowing an attacker to execute arbitrary code by sending specially crafted packets.
Severity
9.8 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-22 03:55 UTC
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MOTEX Inc. | Lanscope Endpoint Manager (On-Premises) (Client program (MR) and Detection agent (DA)) |
Affected:
Ver.9.4.7.1 and earlier
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"problemTypes": [
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"descriptions": [
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"cweId": "CWE-940",
"description": "Improper Verification of Source of a Communication Channel",
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"providerMetadata": {
"dateUpdated": "2025-10-20T07:25:39.916Z",
"orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
"shortName": "jpcert"
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"references": [
{
"url": "https://www.motex.co.jp/news/notice/2025/release251020/"
},
{
"url": "https://jvn.jp/en/jp/JVN86318557/"
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"cveId": "CVE-2025-61932",
"datePublished": "2025-10-20T07:25:39.916Z",
"dateReserved": "2025-10-06T02:24:53.875Z",
"dateUpdated": "2026-02-26T16:57:23.164Z",
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Mitigation
Architecture and Design
- Use a mechanism that can validate the identity of the source, such as a certificate, and validate the integrity of data to ensure that it cannot be modified in transit using an Adversary-in-the-Middle (AITM) attack.
- When designing functionality of actions in the URL scheme, consider whether the action should be accessible to all mobile applications, or if an allowlist of applications to interface with is appropriate.
CAPEC-500: WebView Injection
An adversary, through a previously installed malicious application, injects code into the context of a web page displayed by a WebView component. Through the injected code, an adversary is able to manipulate the DOM tree and cookies of the page, expose sensitive information, and can launch attacks against the web application from within the web page.
CAPEC-594: Traffic Injection
An adversary injects traffic into the target's network connection. The adversary is therefore able to degrade or disrupt the connection, and potentially modify the content. This is not a flooding attack, as the adversary is not focusing on exhausting resources. Instead, the adversary is crafting a specific input to affect the system in a particular way.
CAPEC-595: Connection Reset
In this attack pattern, an adversary injects a connection reset packet to one or both ends of a target's connection. The attacker is therefore able to have the target and/or the destination server sever the connection without having to directly filter the traffic between them.
CAPEC-596: TCP RST Injection
An adversary injects one or more TCP RST packets to a target after the target has made a HTTP GET request. The goal of this attack is to have the target and/or destination web server terminate the TCP connection.