CVE-2026-52539

CriticalCVSS 9.1/10Last modified Jul 31, 2026

Description

Outstatic CMS <= 2.1.9 contains a hardcoded JWT signing secret. When the OST_TOKEN_SECRET environment variable is not set, the application falls back to the default value which is publicly visible in the source code repository. An unauthenticated remote attacker can exploit this by forging JWT session tokens with arbitrary user data and full administrative permissions.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-798

Affected software

No affected versions have been published.

Timeline

Published: Jul 30, 2026
Last modified: Jul 31, 2026
NVD status: Deferred

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