Use after free in Tinyproxy
Priority HIGH 84CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.63076 99th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| tinyproxy | Tinyproxy | 1.11.1; Tinyproxy 1.10.0 | — | No fix listed | CNA |
- Tinyproxy Vendortinyproxy Affected 1.11.1; Tinyproxy 1.10.0 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:tinyproxy_project:tinyproxy:1.10.0:*:*:*:*:*:*:* | 1.10.0 | Vulnerable | Tinyproxy Project |
| cpe:2.3:a:tinyproxy_project:tinyproxy:1.11.1:*:*:*:*:*:*:* | 1.11.1 | Vulnerable | Tinyproxy Project |
- cpe:2.3:a:tinyproxy_project:tinyproxy:1.10.0:*:*:*:*:*:*:* Versions 1.10.0 Vulnerable ·Tinyproxy Project
- cpe:2.3:a:tinyproxy_project:tinyproxy:1.11.1:*:*:*:*:*:*:* Versions 1.11.1 Vulnerable ·Tinyproxy Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2023-49606
- 2026-10-03 Alias added: GHSA-w78j-vw2g-233v
References
More tinyproxy vulnerabilities
- TI-2026-39266 Tinyproxy - HTTP Request Smuggling via Duplicate Content-Length Headers CVSS 4.0CRITICAL 9.3
- TI-2001-00129 Buffer overflow in Tinyproxy HTTP proxy 1.3.3 and earlier allows remote attackers to… CVSS 2.0HIGH 10.0
- TI-2026-39265 Tinyproxy - HTTP Request Smuggling via CL/TE Desynchronization CVSS 4.0CRITICAL 9.3
- TI-2026-03412 tinyproxy Integer Overflow in HTTP Chunked Transfer-Encoding Parser Leading to Denial of Service CVSS 4.0HIGH 8.7
- TI-2026-39882 Tinyproxy - Stathost Detection Bypass via Host Header Manipulation CVSS 4.0HIGH 8.8
- TI-2002-00822 tinyproxy HTTP proxy 1.5.0, 1.4.3, and earlier allows remote attackers to execute… CVSS 2.0HIGH 7.5
Sources
- CVE-2023-49606 · CVE Program
- CVE-2023-49606 · NVD
- FIRST EPSS
- GHSA-w78j-vw2g-233v · GitHub Advisory Database · CC BY 4.0
- CVE-2023-49606 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences