Critical severity9.8NVD Advisory· Published Aug 21, 2026

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.

Affected products

Spip/Spipllm-fuzzy
Range: <4.4.21
Rapid7/Metasploit Frameworkllm-fuzzy

Patches

Vulnerability mechanics

References

blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-21.htmlnvd
github.com/rapid7/metasploit-framework/pull/21790nvd
github.com/rapid7/metasploit-framework/pull/21790nvd
github.com/rapid7/metasploit-framework/pull/21790/commits/b16eca819abb8f1401f21d115e71e3dfc67b847cnvd

News mentions

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cvss	0.637
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000