CVE-2026-45795 Janssen Project: JWE Request Object Signature Verification Bypass in jans-auth-server
Attackers can bypass signature verification on JWE request objects in Janssen Project, allowing unauthorized access when signed requests are enforced.
- 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-2026-45795?
CVE-2026-45795 is a medium-severity vulnerability in JanssenProject jans, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Janssen Project is an open-source identity and access management (IAM) platform. Prior to 2.0.0, jans-auth-server accepts unsigned JWE request objects because JwtAuthorizationRequest skips inner signature validation when jwe.getSignedJWTPayload() returns null, and AuthzRequestService.processRequestObject() does not reject the unrecognized RSA-OAEP algorithm when forceSignedRequestObject=true. This issue is fixed in version 2.0.0.
Weakness: CWE-347
Which versions are affected by CVE-2026-45795?
How do I fix CVE-2026-45795?
No fix has been published for CVE-2026-45795 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-45795 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45795 exists.
Sources
Also known as GHSA-r3gj-4pj2-9j3j.