CVE-2026-85473 Out-of-Range Timestamp Claim Handling in auth0/java-jwt
Attackers can cause service unavailability by sending JWTs with out-of-range timestamp claims, crashing threads before signature verification.
- 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-2026-85473?
CVE-2026-85473 is a medium-severity denial of service vulnerability in Auth0 java-jwt, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The auth0/java-jwt library may terminate a thread if it receives a JWT with a timestamp claim (exp, nbf, iat) containing an out-of-range value. The condition occurs during token parsing, prior to signature verification. Repeated requests of this nature may lead to degraded availability of the affected service.
Which versions are affected by CVE-2026-85473?
How do I fix CVE-2026-85473?
No fix has been published for CVE-2026-85473 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-85473 being exploited?
There is no known exploitation of CVE-2026-85473 in the wild and no public exploit code.