CVE-2026-77806 Code injection in SPIP
Unauthenticated attackers can execute arbitrary code via a malicious HTTP header, requiring immediate upgrades to SPIP.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-77806?
CVE-2026-77806 is a critical code injection vulnerability in SPIP, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-94
Which versions are affected by CVE-2026-77806?
How do I fix CVE-2026-77806?
Upgrade to a fixed version.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-77806 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77806 exists.
Public exploit code: 1 Nuclei template and 1 proofs of concept on GitHub.
Sources
Also known as DEBIAN-CVE-2026-77806, GHSA-vgr8-rqwx-wqrp, UBUNTU-CVE-2026-77806.