CVE-2026-77806

Name	CVE-2026-77806
Description	SPIP before 4.4.21 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026. This is related to code injection via an X-Spip-Filtre HTTP request header that is mishandled by analyse_resultat_skel.
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)
References	DSA-6456-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
spip (PTS)	trixie	4.4.15+dfsg-0+deb13u1	vulnerable
	trixie (security)	4.4.21+dfsg-0+deb13u1	fixed
	forky, sid	4.4.23+dfsg-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
spip	source	trixie	4.4.21+dfsg-0+deb13u1		DSA-6456-1
spip	source	(unstable)	4.4.21+dfsg-1

https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-21.html