CVE-2026-111665: Piranha CMS through 12.2 Missing Authorization in Manager Language API

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-16 · updated 2026-10-19
Weakness: CWE-862

Description

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.

Affected products

PiranhaCMS Piranha: through 12.2

References

https://github.com/PiranhaCMS/piranha.core/blob/v12.2/core/Piranha.Manager/Controllers/LanguageApiController.cs#L21-L89
https://github.com/PiranhaCMS/piranha.core/blob/v12.2/core/Piranha.Manager/Services/LanguageService.cs#L84-L110
https://hackmd.io/@hieuPenguinnn/piranha-cms-manager-language-api-missing-permission
https://www.vulncheck.com/advisories/piranha-cms-through-12.2-missing-authorization-in-manager-language-api
https://hackmd.io/@hieuPenguinnn/piranha-cms-manager-language-api-missing-permission

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