High severity · published Aug 10, 2026
CVE-2026-66738
SPIP < 4.4.18 Code Injection via Navigation Endpoint on SQLite
8.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SP
SPIP · SPIP
before 4.4.18 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66738
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66738
blog.spip.net
https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-18.html
www.vulncheck.com
https://www.vulncheck.com/advisories/spip-code-injection-via-navigation-endpoint-on-sqlite
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