CVE-2026-45795
Deferred Deferred - Pending Action

JWE Signature Bypass in Janssen Project

Publication date: 2026-07-16

Last updated on: 2026-07-16

Assigner: GitHub, Inc.

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.

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Meta Information

Published
2026-07-16
Last Modified
2026-07-16
Generated
2026-07-16
AI Q&A
2026-07-16
EPSS Evaluated
N/A
NVD
CVE-2026-45795
EUVD
EUVD-2026-44969

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
janssen_project jans-auth-server to 2.0.0 (exc)
janssen_project jans-auth-server 2.0.0
janssen jans-auth-server to 2.0.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-347 The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Attack-Flow Graph

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Executive Summary

This vulnerability affects the Janssen Project's jans-auth-server before version 2.0.0. It allows unsigned JWE request objects to be accepted because the system skips signature validation when a specific condition is met. Additionally, it fails to reject an unrecognized RSA-OAEP algorithm under certain settings.

Detection Guidance

To detect this vulnerability, check if your Janssen Project jans-auth-server version is below 2.0.0. Use commands like 'dpkg -l | grep jans-auth-server' or 'rpm -qa | grep jans-auth-server' to verify the installed version. If the version is older than 2.0.0, the system is vulnerable.

Impact Analysis

An attacker could exploit this to manipulate authentication requests, potentially gaining unauthorized access or performing actions on behalf of users. This could lead to data breaches or account takeovers if exploited.

Compliance Impact

This vulnerability could violate compliance requirements by allowing unauthorized access to sensitive data, which is a direct violation of GDPR and HIPAA. Organizations using affected versions may face legal and regulatory penalties.

Mitigation Strategies

Upgrade jans-auth-server to version 2.0.0 or later to address the unsigned JWE request object handling issue.

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