PT-2026-20916 · Spip · Spip

Dorian Piette · Published 2026-01-01 · Updated 2026-02-23 · CVE-2026-27475

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions SPIP versions prior to 4.4.9

Description SPIP versions prior to 4.4.9 contain an Insecure Deserialization flaw. The issue is present in the handling of serialized data within the table valeur filter and the DATA iterator. An attacker who can place malicious serialized content may be able to 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. The SPIP security screen does not mitigate this issue.

Recommendations Update to SPIP version 4.4.9 or later.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-27475

Affected Products

Spip

References · 13

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-27475 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-27475 · Security Note
• https://ubuntu.com/security/CVE-2026-27475 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-27475 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27475 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-27475 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-27475 · Vendor Advisory
• https://twitter.com/CveTodo/status/2024569537148878933 · Twitter Post
• https://git.spip.net/spip/spip · Note
• https://vulncheck.com/advisories/spip-insecure-deserialization · Note
• https://twitter.com/CVEnew/status/2025809103281680685 · Twitter Post
• https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html · Patch, Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2024584131196162214 · Twitter Post