Vulnerability details
CVE-2026-3945
tinyproxy tinyproxy
tinyproxy Integer Overflow in HTTP Chunked Transfer-Encoding Parser Leading to Denial of Service
CVSS 4.0
8.7High
Official description
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).
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (TuranSec) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (TuranSec) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 7.8High | 2.0 | CVEProject cvelistV5 (CNA) (TuranSec) | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| tinyproxy | tinyproxy | <=1.11.3 | CVEProject cvelistV5 (CNA) |
References and advisories
5- 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
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Details
- Published
- 2026-03-30
- Last updated
- 2026-08-10
- State
- Published
- Assigner (CNA)
- TuranSec
Exploit prediction (EPSS)
0.6%
Probability of exploitation in 30 days
48.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-190Integer Overflow or Wraparound