| Name | CVE-2026-31842 |
| Description | 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 against "chunked", even though RFC 7230 specifies that transfer-coding names are case-insensitive. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1133355 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| tinyproxy (PTS) | bullseye | 1.10.0-5 | vulnerable |
| bullseye (security) | 1.10.0-5+deb11u1 | vulnerable |
| bookworm, bookworm (security) | 1.11.1-2.1+deb12u1 | vulnerable |
| trixie | 1.11.2-1 | vulnerable |
| forky, sid | 1.11.3-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| tinyproxy | source | (unstable) | (unfixed) | | | 1133355 |
Notes
[trixie] - tinyproxy <no-dsa> (Minor issue)
[bookworm] - tinyproxy <no-dsa> (Minor issue)
[bullseye] - tinyproxy <postponed> (Minor issue)
https://github.com/tinyproxy/tinyproxy/issues/604
https://github.com/tinyproxy/tinyproxy/commit/879bf844abffa0bf5fae6aff0c73179024dd9f98