CVE-2025-58186

Name	CVE-2025-58186
Description	Despite HTTP headers having a default limit of 1MB, the number of cookies that can be parsed does not have a limit. By sending a lot of very small cookies such as "a=;", an attacker can make an HTTP server allocate a large amount of structs, causing large memory consumption.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
golang-1.15 (PTS)	bullseye	1.15.15-1~deb11u4	vulnerable
golang-1.19 (PTS)	bookworm	1.19.8-2	vulnerable
golang-1.24 (PTS)	trixie	1.24.4-1	vulnerable
	forky, sid	1.24.9-1	fixed
golang-1.25 (PTS)	forky, sid	1.25.3-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
golang-1.15	source	(unstable)	(unfixed)
golang-1.19	source	(unstable)	(unfixed)
golang-1.23	source	(unstable)	(unfixed)
golang-1.24	source	(unstable)	1.24.8-1
golang-1.25	source	(unstable)	1.25.2-1

Notes

[trixie] - golang-1.24 <no-dsa> (Minor issue)
[bookworm] - golang-1.19 <no-dsa> (Minor issue)
[bullseye] - golang-1.15 <postponed> (Limited support, minor issue, DoS, follow bookworm DSAs/point-releases)
https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI/m/qZN5nc-mBgAJ
https://github.com/golang/go/issues/75672
https://github.com/golang/go/commit/100c5a66802b5a895b1d0e5ed3b7918f899c4833 (go1.25.2)
https://github.com/golang/go/commit/c6b04dd33b0215f5deb83724661921842bf67607 (go1.24.8)