Auth bypass in Piranhacms Piranha Cms
CVE-2026-111665
Piranha CMS through 12.2 contains a missing authorization vulnerability in the Piranha.Manager LanguageApiController that allows any authenticated manager user to list, create, edit and delete site languages without the granular Language, LanguageAdd, LanguageEdit or LanguageDelete permissions. Attackers can call the manager/api/language Get, Save and Delete actions directly to remove languages and reassign sites to the default, affecting localized content instance-wide.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@hieuPenguinnn/piranha-cms-manager-language-api-missing-permission (third-party-advisory)
- github.com/PiranhaCMS/piranha.core/blob/v12.2/core/Piranha.Manager/Controllers/… (technical-description)
- github.com/PiranhaCMS/piranha.core/blob/v12.2/core/Piranha.Manager/Services/Lan… (technical-description)
- www.vulncheck.com/advisories/piranha-cms-through-12.2-missing-authorization-in-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111665?
- CVE-2026-111665 is a medium-severity vulnerability in Piranhacms Piranha Cms, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-10-16.
- How severe is CVE-2026-111665?
- Medium severity. CVSS v3 base score is 5.4 out of 10.