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High · 8.8 Public exploit CVE-2026-66738 EUVD-2026-55655GHSA-ghch-c3xx-8rq5

SPIP < 4.4.18 Code Injection via Navigation Endpoint on SQLite

Published Aug 10, 2026 · Updated Aug 14, 2026 · Assigned by VulnCheck

Vendor: SPIP Product: SPIP Package: spip Package: spip Ecosystem: Debian Ecosystem: Ubuntu

Description

SPIP before 4.4.18 contains a code injection vulnerability in SQLite-backed installations. The navigation menu endpoint improperly handles array-typed user input, which bypasses input sanitization and allows the value to break out of an internal quoted string context when evaluated as PHP. An authenticated attacker with at minimum editor (redacteur) privileges can submit a single crafted GET request to /ecrire/?exec=navigation to execute arbitrary OS commands in the web server process. MySQL-backed installations are not affected.

Affected products

VendorProductAffectedFixed
SPIP SPIP < 4.4.18 4.4.18

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 ↗
ReleasePackageFixed inAdvisory
Debian 14 spip 4.4.18+dfsg-1 —
Debian 13 spip 4.4.19+dfsg-0+deb13u1 —

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 26.10 spip No fix yet —
Ubuntu 26.04 LTS 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)
ReleasePackageFixed inAdvisory
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.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • fixedbyreboot/CVE-2026-66738-POC ★ 0 · Nov 10, 2026

    POC exploit for CVE-2026-66738 - authenticated code injection to OS command execution in SPIP via the navigation editor endpoint on SQLite installs. Vulnerable 4.4.16 vs fixed 4.4.18 control.

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References