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13 vulnerabilities found for Tinyproxy by Tinyproxy
CVE-2026-54388 (GCVE-0-2026-54388)
Vulnerability from cvelistv5 – Published: 2026-06-17 19:59 – Updated: 2026-06-18 15:33 X_Open Source
VLAI
Title
Tinyproxy - HTTP Request Smuggling via Duplicate Content-Length Headers
Summary
Tinyproxy through 1.11.3, fixed in commit 364cdb6, fails to reject requests containing multiple Content-Length headers with differing values, forwarding all duplicate headers to the backend while using the first value to determine how many request body bytes to consume. Remote attackers can desynchronize the proxy and backend parser state, allowing injection of arbitrary HTTP requests to the backend to enable cache poisoning, access control bypass, and request hijacking.
Severity
9.1 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tinyproxy/tinyproxy/issues/609 | technical-description |
| https://github.com/tinyproxy/tinyproxy/pull/610 | issue-tracking |
| https://github.com/tinyproxy/tinyproxy/commit/364… | patch |
| https://www.vulncheck.com/advisories/tinyproxy-ht… | third-party-advisory |
Impacted products
Date Public
2026-05-07 00:00
Credits
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CVE-2026-54387 (GCVE-0-2026-54387)
Vulnerability from cvelistv5 – Published: 2026-06-17 19:48 – Updated: 2026-06-18 13:10 X_Open Source
VLAI
Title
Tinyproxy - HTTP Request Smuggling via CL/TE Desynchronization
Summary
Tinyproxy through 1.11.3, fixed in commit ff45d3b, fails to reconcile conflicting Content-Length and Transfer-Encoding: chunked headers, forwarding both verbatim to the backend while using Content-Length to determine how many request body bytes to consume. Remote attackers can desynchronize the proxy and backend parser state, allowing injection of arbitrary HTTP requests to the backend to enable cache poisoning, access control bypass, and request hijacking.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tinyproxy/tinyproxy/issues/609 | technical-description |
| https://github.com/tinyproxy/tinyproxy/pull/610 | issue-tracking |
| https://github.com/tinyproxy/tinyproxy/commit/ff4… | patch |
| https://www.vulncheck.com/advisories/tinyproxy-ht… | third-party-advisory |
Impacted products
Date Public
2026-05-07 00:00
Credits
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CVE-2026-55202 (GCVE-0-2026-55202)
Vulnerability from cvelistv5 – Published: 2026-06-17 19:13 – Updated: 2026-06-17 19:45 X_Open Source
VLAI
Title
Tinyproxy - Stathost Detection Bypass via Host Header Manipulation
Summary
Tinyproxy through 1.11.3, fixed in commit 09312a1, fails to properly validate the Host header during stathost detection, allowing unauthenticated attackers to access the stats page by injecting a matching Host header or bypass detection via port manipulation. Remote attackers can trigger unauthorized access to internal proxy statistics or misroute requests as transparent proxy connections to circumvent access controls.
Severity
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tinyproxy/tinyproxy/pull/606 | issue-tracking |
| https://github.com/tinyproxy/tinyproxy/commit/093… | patch |
| https://www.vulncheck.com/advisories/evil-winrm-p… | third-party-advisory |
Impacted products
Date Public
2026-04-17 00:00
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CVE-2026-3945 (GCVE-0-2026-3945)
Vulnerability from cvelistv5 – Published: 2026-03-30 07:05 – Updated: 2026-03-30 15:02
VLAI
Summary
An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service (DoS). The issue occurs because chunk size values are parsed using strtol() without properly validating overflow conditions (e.g., errno == ERANGE). A crafted chunk size such as 0x7fffffffffffffff (LONG_MAX) bypasses the existing validation check (chunklen < 0), leading to a signed integer overflow during arithmetic operations (chunklen + 2). This results in incorrect size calculations, causing the proxy to attempt reading an extremely large amount of request-body data and holding worker connections open indefinitely. An attacker can exploit this behavior to exhaust all available worker slots, preventing new connections from being accepted and causing complete service unavailability. Upstream addressed this issue in commit bb7edc4; however, the latest stable release (1.11.3) remains affected at the time of publication.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/tinyproxy/tinyproxy/issues/602 | issue-trackingtechnical-description |
| https://github.com/tinyproxy/tinyproxy/pull/603 | patch |
| https://github.com/tinyproxy/tinyproxy/commit/969852c | patch |
| https://github.com/tinyproxy/tinyproxy/commit/bb7edc4 | patch |
| https://github.com/tinyproxy/tinyproxy/releases | release-notes |
Credits
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CVE-2023-49606 (GCVE-0-2023-49606)
Vulnerability from cvelistv5 – Published: 2024-05-01 15:31 – Updated: 2025-11-04 17:13
VLAI
Summary
A use-after-free vulnerability exists in the HTTP Connection Headers parsing in Tinyproxy 1.11.1 and Tinyproxy 1.10.0. A specially crafted HTTP header can trigger reuse of previously freed memory, which leads to memory corruption and could lead to remote code execution. An attacker needs to make an unauthenticated HTTP request to trigger this vulnerability.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
Credits
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CVE-2023-40533 (GCVE-0-2023-40533)
Vulnerability from cvelistv5 – Published: 2024-05-01 15:31 – Updated: 2024-05-08 21:49
VLAI
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CVE-2002-0847 (GCVE-0-2002-0847)
Vulnerability from cvelistv5 – Published: 2003-04-02 05:00 – Updated: 2024-08-08 03:03
VLAI
Summary
tinyproxy HTTP proxy 1.5.0, 1.4.3, and earlier allows remote attackers to execute arbitrary code via memory that is freed twice (double-free).
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.debian.org/security/2002/dsa-145 | vendor-advisoryx_refsource_DEBIAN |
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| http://sourceforge.net/project/shownotes.php?rele… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/4731 | vdb-entryx_refsource_BID |
Date Public
2002-08-07 00:00
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CVE-2001-0129 (GCVE-0-2001-0129)
Vulnerability from cvelistv5 – Published: 2001-05-07 04:00 – Updated: 2024-08-08 04:06
VLAI
Summary
Buffer overflow in Tinyproxy HTTP proxy 1.3.3 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long connect request.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
4 references
| URL | Tags |
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| http://www.debian.org/security/2001/dsa-018 | vendor-advisoryx_refsource_DEBIAN |
| http://www.securityfocus.com/bid/2217 | vdb-entryx_refsource_BID |
| http://marc.info/?l=bugtraq&m=97975486527750&w=2 | mailing-listx_refsource_BUGTRAQ |
Date Public
2001-01-17 00:00
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CVE-2026-3945 (GCVE-0-2026-3945)
Vulnerability from nvd – Published: 2026-03-30 07:05 – Updated: 2026-03-30 15:02
VLAI
Summary
An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service (DoS). The issue occurs because chunk size values are parsed using strtol() without properly validating overflow conditions (e.g., errno == ERANGE). A crafted chunk size such as 0x7fffffffffffffff (LONG_MAX) bypasses the existing validation check (chunklen < 0), leading to a signed integer overflow during arithmetic operations (chunklen + 2). This results in incorrect size calculations, causing the proxy to attempt reading an extremely large amount of request-body data and holding worker connections open indefinitely. An attacker can exploit this behavior to exhaust all available worker slots, preventing new connections from being accepted and causing complete service unavailability. Upstream addressed this issue in commit bb7edc4; however, the latest stable release (1.11.3) remains affected at the time of publication.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/tinyproxy/tinyproxy/issues/602 | issue-trackingtechnical-description |
| https://github.com/tinyproxy/tinyproxy/pull/603 | patch |
| https://github.com/tinyproxy/tinyproxy/commit/969852c | patch |
| https://github.com/tinyproxy/tinyproxy/commit/bb7edc4 | patch |
| https://github.com/tinyproxy/tinyproxy/releases | release-notes |
Credits
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CVE-2023-49606 (GCVE-0-2023-49606)
Vulnerability from nvd – Published: 2024-05-01 15:31 – Updated: 2025-11-04 17:13
VLAI
Summary
A use-after-free vulnerability exists in the HTTP Connection Headers parsing in Tinyproxy 1.11.1 and Tinyproxy 1.10.0. A specially crafted HTTP header can trigger reuse of previously freed memory, which leads to memory corruption and could lead to remote code execution. An attacker needs to make an unauthenticated HTTP request to trigger this vulnerability.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
Credits
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CVE-2023-40533 (GCVE-0-2023-40533)
Vulnerability from nvd – Published: 2024-05-01 15:31 – Updated: 2024-05-08 21:49
VLAI
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CVE-2002-0847 (GCVE-0-2002-0847)
Vulnerability from nvd – Published: 2003-04-02 05:00 – Updated: 2024-08-08 03:03
VLAI
Summary
tinyproxy HTTP proxy 1.5.0, 1.4.3, and earlier allows remote attackers to execute arbitrary code via memory that is freed twice (double-free).
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.debian.org/security/2002/dsa-145 | vendor-advisoryx_refsource_DEBIAN |
| http://www.iss.net/security_center/static/9079.php | vdb-entryx_refsource_XF |
| http://sourceforge.net/project/shownotes.php?rele… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/4731 | vdb-entryx_refsource_BID |
Date Public
2002-08-07 00:00
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CVE-2001-0129 (GCVE-0-2001-0129)
Vulnerability from nvd – Published: 2001-05-07 04:00 – Updated: 2024-08-08 04:06
VLAI
Summary
Buffer overflow in Tinyproxy HTTP proxy 1.3.3 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long connect request.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://www.debian.org/security/2001/dsa-018 | vendor-advisoryx_refsource_DEBIAN |
| http://www.securityfocus.com/bid/2217 | vdb-entryx_refsource_BID |
| http://marc.info/?l=bugtraq&m=97975486527750&w=2 | mailing-listx_refsource_BUGTRAQ |
Date Public
2001-01-17 00:00
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