CVE-2026-77806 [CRITICAL] – SPIP before 4.4.21 allows unauthenticated remote attackers to execute arbitrary code, as e

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.