What is CVE-2026-66738?

CVE-2026-66738 is a high-severity vulnerability in Spip, classified under Code Injection. CVSS score: 8.8/10. Published 2026-08-10.

How severe is CVE-2026-66738?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Spip

CVE-2026-66738

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 in…

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Spip — versions 0

Weakness classification (CWE)

CWE-94 — Code Injection

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-66738?: CVE-2026-66738 is a high-severity vulnerability in Spip, classified under Code Injection. CVSS score: 8.8/10. Published 2026-08-10.
How severe is CVE-2026-66738?: High severity. CVSS v3 base score is 8.8 out of 10.