Janssen Project: JWE Request Object Signature Verification Bypass in jans-auth-server
Priority MEDIUM 63CWE-347Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-347.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00193 9th percentileScored 2026-11-07
Fix Fixed jans (JanssenProject): 2.0.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| JanssenProject | jans | before 2.0.0 | 2.0.0 | Patch available | CNA |
- jans VendorJanssenProject Affected before 2.0.0 Fixed in 2.0.0 Patch available CNA
Remediation
- Fix · CNA jans (JanssenProject) Fixed in 2.0.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-45795
References
More JanssenProject vulnerabilities
- TI-2025-33007 Janssen Config API returns results without scope verification CVSS 4.0HIGH 8.2
- TI-2025-34610 Jans CLI stores plaintext passwords in the local cli_cmd.log file CVSS 4.0MEDIUM 6.9
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences