CVE-2026-27475SPIP < 4.4.9 Insecure Deserialization

Description

SPIP before 4.4.9 allows Insecure Deserialization in the public area through the table_valeur filter and the DATA iterator, which accept serialized data. An attacker who can place malicious serialized content (a pre-condition requiring prior access or another vulnerability) can trigger arbitrary object instantiation and potentially achieve code execution. The use of serialized data in these components has been deprecated and will be removed in SPIP 5. This vulnerability is not mitigated by the SPIP security screen.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html vendor-advisorypatchRelease NotesVendor Advisory
• https://git.spip.net/spip/spip productProduct
• VulnCheck Advisory: SPIP < 4.4.9 Insecure Deserialization third-party-advisoryThird Party Advisory