CVE-2026-27475
SPIP < 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.
INFO
Published Date :
Feb. 19, 2026, 7:22 p.m.
Last Modified :
Feb. 24, 2026, 7:37 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update SPIP to version 4.4.9 or later.
- Remove serialized data from table_valeur filter.
- Remove serialized data from DATA iterator.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-27475.
| URL | Resource |
|---|---|
| https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html | Vendor Advisory Release Notes |
| https://git.spip.net/spip/spip | Product |
| https://www.vulncheck.com/advisories/spip-insecure-deserialization | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-27475 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-27475
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-27475 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-27475 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 24, 2026
Action Type Old Value New Value Added CWE CWE-502 Added CPE Configuration OR *cpe:2.3:a:spip:spip:*:*:*:*:*:*:*:* versions from (including) 4.4.0 up to (excluding) 4.4.9 Added Reference Type VulnCheck: https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html Types: Release Notes, Vendor Advisory Added Reference Type VulnCheck: https://git.spip.net/spip/spip Types: Product Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/spip-insecure-deserialization Types: Third Party Advisory -
New CVE Received by [email protected]
Feb. 19, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Added Reference https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html Added Reference https://git.spip.net/spip/spip Added Reference https://www.vulncheck.com/advisories/spip-insecure-deserialization