CVE-2026-124040

Name	CVE-2026-124040
Description	CivetWeb through 1.16, when built with USE_HTTP2 and enable_http2 on, contains a use-after-free vulnerability in handle_http2() that retains freed :method and :path pointers. Unauthenticated remote attackers can send a later HEADERS frame omitting these pseudo-headers to influence request method or path seen by access rules, or crash the server.
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
civetweb (PTS)	bookworm	1.15+dfsg-4	vulnerable
	trixie	1.16+dfsg-2+deb13u1	vulnerable
	forky, sid	1.16+dfsg-6	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
civetweb	source	(unstable)	(unfixed)

https://github.com/civetweb/civetweb/issues/1379