CVE-2026-77647

State: Published
Severity: 9.8 Critical
Published: Aug 20, 2026
Updated: Aug 21, 2026
Reserved: Aug 20, 2026

Description

SPIP before 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026. This is related to incorrect identification of <?php blocks, and var_export's mishandling of certain cases such as presence of a '<' character.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	mitre

Weaknesses

CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected Products

Product	Versions
SPIPSPIP	before 4.4.20Affected

References

https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-20.htmlvendor-advisory
https://lists.debian.org/debian-security-announce/2026/msg00359.htmlthird-party-advisory

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