CVE-2026-52539 Hardcoded credentials in n/a
An attacker can forge JWT tokens to gain administrative access if the default signing secret is used, requiring configuration of a unique secret.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-52539?
CVE-2026-52539 is a critical vulnerability in n/a, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-798
Which versions are affected by CVE-2026-52539?
How do I fix CVE-2026-52539?
No fix has been published for CVE-2026-52539 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-52539 being exploited?
There is no known exploitation of CVE-2026-52539 in the wild and no public exploit code.
Sources
Also known as GHSA-59rr-38mm-f3g9.