CVE catalog

CVE-2026-31842

Severity: High · CVSS 8.7
Published: Apr 7, 2026, 11:17:33 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.57% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	tinyproxy	sid	`1.11.3-1`	vulnerable
Debian	tinyproxy	forky	`1.11.3-1`	vulnerable
Debian	tinyproxy	trixie	`1.11.2-1`	vulnerable
Debian	tinyproxy	bookworm	`1.11.1-2.1+deb12u1`	vulnerable
Debian	tinyproxy	bookworm-security	`1.11.1-2.1+deb12u1`	vulnerable
Cpe	tinyproxy	Not reported	Not reported	vulnerable
Cpe	tinyproxy	Not reported	Not reported	unknown

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	tinyproxy	source	sid	`(unfixed)`	not yet assigned	Not reported	[1133355]
Debian	tinyproxy	source	forky	`(unfixed)`	not yet assigned	Not reported	[1133355]
Debian	tinyproxy	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1133355]
Debian	tinyproxy	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1133355]

[Debian bug #1133355]

Notes

[trixie] tinyproxy: Minor issue [bookworm] tinyproxy: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[tinyproxy]Affected
Details (6)
- 1.11.1-2.1+deb12u1 · all · bookworm
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
- 1.11.1-2.1+deb12u1 · all · bookworm
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
- 1.11.2-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
- 1.11.2-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
- 1.11.1-2.1+deb12u1 · all · bookworm-security
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
- 1.11.1-2.1+deb12u1 · all · bookworm-security
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
[tinyproxy-bin]Affected
Source package: [tinyproxy]
Details (6)
- 1.11.1-2.1+deb12u1 · amd64 · bookworm
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
- 1.11.1-2.1+deb12u1 · arm64 · bookworm
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
- 1.11.2-1~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
- 1.11.2-1~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
- 1.11.1-2.1+deb12u1 · amd64 · bookworm-security
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12
- 1.11.1-2.1+deb12u1 · arm64 · bookworm-security
  Affected
  nvd · tinyproxy · debian · bookworm; nvd · tinyproxy · debian · 12

[Debian 13 (Trixie)]

[tinyproxy]Affected
Details (4)
- 1.11.2-1 · all · trixie
  Affected
  nvd · tinyproxy · debian · 13
- 1.11.2-1 · all · trixie
  Affected
  nvd · tinyproxy · debian · 13
- 1.11.3-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · tinyproxy · debian · 13
- 1.11.3-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · tinyproxy · debian · 13
[tinyproxy-bin]Affected
Source package: [tinyproxy]
Details (4)
- 1.11.2-1 · amd64 · trixie
  Affected
  nvd · tinyproxy · debian · 13
- 1.11.2-1+b1 · arm64 · trixie
  Affected
  nvd · tinyproxy · debian · 13
- 1.11.3-1~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · tinyproxy · debian · 13
- 1.11.3-1~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · tinyproxy · debian · 13

Observed: Oct 23, 2026, 10:34:57 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]