CVE-2026-52539: n/a
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.
AI Analysis
Technical Summary
CVE-2026-52539 affects Outstatic CMS versions <=2.1.9. The vulnerability arises because the application falls back to a hardcoded JWT signing secret when the OST_TOKEN_SECRET environment variable is unset. This secret is publicly exposed in the source code repository, enabling attackers to create forged JWT tokens that grant administrative access without authentication.
Potential Impact
An unauthenticated remote attacker can exploit this vulnerability to forge JWT session tokens, effectively bypassing authentication controls and gaining full administrative privileges within the affected Outstatic CMS instances.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, ensure that the OST_TOKEN_SECRET environment variable is set to a strong, unique secret value to prevent fallback to the hardcoded default. Avoid using versions <=2.1.9 in production environments without this mitigation.
CVE-2026-52539: n/a
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.
CVSS v3.1
Score 9.1critical
Affected software
pkg:github/avitorio/outstaticRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-52539 affects Outstatic CMS versions <=2.1.9. The vulnerability arises because the application falls back to a hardcoded JWT signing secret when the OST_TOKEN_SECRET environment variable is unset. This secret is publicly exposed in the source code repository, enabling attackers to create forged JWT tokens that grant administrative access without authentication.
Potential Impact
An unauthenticated remote attacker can exploit this vulnerability to forge JWT session tokens, effectively bypassing authentication controls and gaining full administrative privileges within the affected Outstatic CMS instances.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, ensure that the OST_TOKEN_SECRET environment variable is set to a strong, unique secret value to prevent fallback to the hardcoded default. Avoid using versions <=2.1.9 in production environments without this mitigation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-08T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6bbd2e9c2644c7f8b08cc8
Added to database: 07/30/2026, 21:07:58 UTC
Last enriched: 07/30/2026, 21:24:04 UTC
Last updated: 07/31/2026, 19:52:40 UTC
Views: 8
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.