CVE-2026-45795
Janssen Project: JWE Request Object Signature Verification Bypass in jans-auth-server
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.
INFO
Published Date :
July 16, 2026, 5:16 p.m.
Last Modified :
Oct. 24, 2026, 8:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Jans-Auth-Server to version 2.0.0 or later.
- Verify JWE request object validation is enforced.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45795.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45795 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45795
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45795 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45795 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Added Translation Title: jans de JanssenProject, Description: El Proyecto Janssen es una plataforma de código abierto de gestión de identidades y accesos (IAM). Antes de la versión 2.0.0, jans-auth-servidor acepta objetos de solicitud JWE sin firmar porque JwtAuthorizationRequest omite la validación de la firma interna cuando jwe.getSignedJWTPayload() devuelve nulo, y AuthzRequestService.processRequestObject() no rechaza el algoritmo RSA-OAEP no reconocido cuando forceSignedRequestObject=true. Este problema se corrige en la versión 2.0.0. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 16, 2026
Action Type Old Value New Value Added Reference https://github.com/JanssenProject/jans/security/advisories/GHSA-r3gj-4pj2-9j3j Added SSVC {'id': 'CVE-2026-45795', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-16T18:05:48.605170Z'} -
New CVE Received by [email protected]
Jul. 16, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'JanssenProject', 'product': 'jans', 'versions': [{'status': 'affected', 'version': '< 2.0.0'}]}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Added CWE CWE-347 Added Reference https://github.com/JanssenProject/jans/commit/0cdd214870ee30eb2186261f21c85b9e9fc63b5c Added Reference https://github.com/JanssenProject/jans/pull/13438 Added Reference https://github.com/JanssenProject/jans/releases/tag/v2.0.0 Added Reference https://github.com/JanssenProject/jans/security/advisories/GHSA-r3gj-4pj2-9j3j