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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| SPIP | SPIP | 4.4.0 – < 4.4.9 | 4.4.9 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | spip | 4.4.9+dfsg-1 | — |
| Debian 13 | spip | 4.4.11+dfsg-0+deb13u1 | DSA-6155-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | spip | No fix yet | — |
| Ubuntu 25.10 | spip | No fix yet | — |
| Ubuntu 24.04 LTS | spip | No fix yet | — |
| Ubuntu 22.04 LTS | spip | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | spip | No fix yet | — |
| Ubuntu Pro 18.04 LTS | spip | No fix yet | — |
| Ubuntu Pro 16.04 LTS | spip | No fix yet | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
Trachinus/CVE-2026-27475 ★ 0 · Sep 1, 2026
PoC for CVE-2026-27475
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- DSA-6155-1 spip - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html vendor-advisory patch
- https://git.spip.net/spip/spip product
- VulnCheck Advisory: SPIP < 4.4.9 Insecure Deserialization third-party-advisory