What’s Vulnerable › Vulnerabilities

CVE-2026-77647

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-20 · updated 2026-10-26
• Weakness: CWE-94

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.

Affected products

• SPIP: before 4.4.20 — fixed in 4.4.20

How to fix

Upgrade to a fixed version: SPIP 4.4.20. Check the vendor advisory for mitigations.

References

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

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