What is GHSA-59rr-38mm-f3g9?

GHSA-59rr-38mm-f3g9 is a security advisory published by GitHub Security Advisories with Critical severity. Outstatic CMS \u003c= 2.1.9 contains a hardcoded JWT signing secret. When the OST_TOKEN_SECRET...

Which CVE IDs does GHSA-59rr-38mm-f3g9 cover?

GHSA-59rr-38mm-f3g9 covers the following CVE IDs: CVE-2026-52539. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-59rr-38mm-f3g9?

GHSA-59rr-38mm-f3g9 has a CVSS v3 base score of 9.1, published by GitHub Security Advisories.

GHSA-59rr-38mm-f3g9CriticalCVSS 9.1

Outstatic CMS <= 2.1.9 contains a hardcoded JWT signing secret. When the OST_TOKEN_SECRET...

Vendor

GitHub Security Advisories

Published

July 30, 2026

Last Modified

July 31, 2026

🔗 CVE IDs covered (1)

CVE-2026-52539 →

📋 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.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-52539
https://github.com/avitorio/outstatic
https://github.com/avitorio/outstatic/blob/canary/packages/outstatic/src/utils/constants.ts
https://github.com/advisories/GHSA-59rr-38mm-f3g9