SEPTEMBER 17, 2026
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Case File

CVE-2026-52539

CRITICAL · CVSS 9.1 EPSS 0.30% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-30 · Last synced 2026-08-29

CyberRota Analysis

AI-Generated

Outstatic CMS versions up to 2.1.9 are vulnerable due to a hardcoded JWT signing secret, which can be exploited when the OST_TOKEN_SECRET environment variable is not set. This allows unauthenticated remote attackers to forge JWT session tokens, granting them arbitrary user data access and full administrative permissions. Organizations using this CMS should prioritize patching to mitigate the risk of unauthorized access and potential data breaches.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-52539
Severity
CRITICAL
CVSS
9.1
EPSS
0.30%

Original NVD 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.