# CVE-2026-66738: SPIP code injection in navigation endpoint

Source: https://junglewise.ai/threats/cve-2026-66738-spip-code-injection-in-navigation-endpoint  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-10. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-66738 · Severity: high · CVSS 8.8 · Published 2026-08-10

SPIP is a popular open-source content management system used to build and manage websites. This vulnerability affects SQLite-backed installations and allows authenticated editors to execute arbitrary operating system commands through a malformed request to the navigation menu configuration page, potentially leading to complete server compromise.

Technologies: [Spip](https://junglewise.ai/threats/technologies/spip). Vendors: [Spip](https://junglewise.ai/threats/vendors/spip).

## Quick answers

**Is CVE-2026-66738 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-66738 being exploited in the wild.

**How severe is CVE-2026-66738?** High severity, with a CVSS score of 8.8, published 10 August 2026.

**Which products and versions are affected?** Spip before 4.4.18.

**Is there a fix for CVE-2026-66738?** A patch was published on 2026-08-10: SPIP 4.4.18 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-66738 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-66738?** Check whether you run Spip at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A code injection vulnerability exists in SPIP's navigation menu endpoint (/ecrire/?exec=navigation) where improper handling of array-typed user input bypasses input sanitization and allows an attacker to break out of an internal quoted string context during PHP evaluation. The vulnerability requires authentication (minimum editor/redacteur privileges) and is triggered via a single crafted GET request. An authenticated attacker can achieve arbitrary OS command execution in the web server process context. The vulnerability affects only SQLite-backed installations; MySQL-backed deployments are not affected. The fix is available in SPIP 4.4.18 and later versions.

## Affected products

- SPIP SPIP before 4.4.18

## Timeline

- 2026-08-10: disclosed
- 2026-08-10: patched: SPIP 4.4.18 released

## References

- [https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-18.html](https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-18.html)
- [https://www.vulncheck.com/advisories/spip-code-injection-via-navigation-endpoint-on-sqlite](https://www.vulncheck.com/advisories/spip-code-injection-via-navigation-endpoint-on-sqlite)

## Related threats

- [SPIP SQL injection via parameter mismatch](https://junglewise.ai/threats/cve-2026-122032-spip-before-4-4-29-contains-a-sql-injection-vulnerability-that)
- [SPIP server-side request forgery in recuperer_url()](https://junglewise.ai/threats/cve-2026-109378-spip-before-4-4-18-contains-a-server-side-request-forgery)
- [SPIP mass assignment in editer_objet leading to RCE](https://junglewise.ai/threats/cve-2026-72710-spip-mass-assignment-in-editer-objet-leading-to-rce)
- [SPIP missing authorization in sensitive actions](https://junglewise.ai/threats/cve-2026-72709-spip-missing-authorization-in-sensitive-actions)
- [SPIP unauthenticated blind SQL injection in SQL escaping](https://junglewise.ai/threats/cve-2026-72708-spip-unauthenticated-blind-sql-injection-in-sql-escaping)