CVE-2026-45795: CWE-347: Improper Verification of Cryptographic Signature in JanssenProject jans
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.
AI Analysis
Technical Summary
CVE-2026-45795 describes a cryptographic signature verification flaw in the JanssenProject jans open-source IAM platform versions before 2.0.0. The vulnerability arises because JwtAuthorizationRequest bypasses inner signature validation if the signed JWT payload is null, and AuthzRequestService.processRequestObject() fails to reject unrecognized RSA-OAEP algorithms when the forceSignedRequestObject flag is true. This allows the acceptance of unsigned JWE request objects, potentially undermining the integrity of authorization requests. The issue is resolved in version 2.0.0.
Potential Impact
The vulnerability allows an attacker to submit unsigned JWE request objects that are accepted by the system, potentially leading to unauthorized or manipulated authorization requests. The CVSS score of 5.3 (medium severity) reflects limited impact on confidentiality and availability but indicates a potential integrity issue. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade to JanssenProject jans version 2.0.0 or later, where this vulnerability is fixed. Patch status is not explicitly confirmed beyond the fix in 2.0.0, so users should verify with the vendor advisory for the latest remediation guidance.
CVE-2026-45795: CWE-347: Improper Verification of Cryptographic Signature in JanssenProject jans
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.
CVSS v3.1
Score 5.3medium
Affected software
pkg:github/janssenproject/jansRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-45795 describes a cryptographic signature verification flaw in the JanssenProject jans open-source IAM platform versions before 2.0.0. The vulnerability arises because JwtAuthorizationRequest bypasses inner signature validation if the signed JWT payload is null, and AuthzRequestService.processRequestObject() fails to reject unrecognized RSA-OAEP algorithms when the forceSignedRequestObject flag is true. This allows the acceptance of unsigned JWE request objects, potentially undermining the integrity of authorization requests. The issue is resolved in version 2.0.0.
Potential Impact
The vulnerability allows an attacker to submit unsigned JWE request objects that are accepted by the system, potentially leading to unauthorized or manipulated authorization requests. The CVSS score of 5.3 (medium severity) reflects limited impact on confidentiality and availability but indicates a potential integrity issue. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade to JanssenProject jans version 2.0.0 or later, where this vulnerability is fixed. Patch status is not explicitly confirmed beyond the fix in 2.0.0, so users should verify with the vendor advisory for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-13T08:19:32.603Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a590f0d68715ace4361518a
Added to database: 07/16/2026, 17:04:13 UTC
Last enriched: 07/16/2026, 17:18:42 UTC
Last updated: 07/16/2026, 20:49:00 UTC
Views: 8
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