Vulnerability in Tinyproxy Project
CVE-2026-31842
Tinyproxy through 1.11.3 is vulnerable to HTTP request parsing desynchronization due to a case-sensitive comparison of the Transfer-Encoding header in src/reqs.c. The is_chunked_transfer() function uses strcmp() to compare the header value…
Vulnerability class: HTTP Request Smuggling
EPSS: 0.001 (34.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Tinyproxy Project — versions 0
- Tinyproxy_project Tinyproxy
Weakness classification (CWE)
References
- Upstream issue report and reproduction details (issue-tracking, Exploit, technical-description, Issue Tracking, third-party-advisory)
- Tinyproxy upstream project (Product, product)
- RFC 7230: transfer-coding names are case-insensitive (Technical Description, Exploit, technical-description)
Frequently asked questions
- What is CVE-2026-31842?
- CVE-2026-31842 is a high-severity vulnerability in Tinyproxy Project, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.5/10. Published 2026-04-07.
- How severe is CVE-2026-31842?
- High severity. CVSS v3 base score is 7.5 out of 10.