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CVE-2026-45795— Janssen Project: JWE Request Object Signature Verification Bypass in jans-auth-server

Quick assessment

Affected
JanssenProject jans
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Janssen Project Janssen是Janssen Project组织开源的一个开源的用户认证组件。 Janssen Project janssen 2.0.0之前版本存在加密问题漏洞，该漏洞源于签名验证绕过问题，JwtAuthorizationRequest在jwe.getSignedJWTPayload()返回null时跳过内部签名验证，且AuthzRequestService.processRequestObject()在forceSignedRequestObject=true时不拒绝

CVSS 5.3 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
JanssenProject jans < 2.0.0 affected
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I. Basic Information for CVE-2026-45795

Vulnerability Information
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Vulnerability Title
Janssen Project: JWE Request Object Signature Verification Bypass in jans-auth-server
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Janssen Project janssen 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Janssen Project Janssen是Janssen Project组织开源的一个开源的用户认证组件。 Janssen Project janssen 2.0.0之前版本存在加密问题漏洞，该漏洞源于签名验证绕过问题，JwtAuthorizationRequest在jwe.getSignedJWTPayload()返回null时跳过内部签名验证，且AuthzRequestService.processRequestObject()在forceSignedRequestObject=true时不拒绝
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
JanssenProject jans < 2.0.0 -

II. Public POCs for CVE-2026-45795

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III. Intelligence Information for CVE-2026-45795

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Patches & Fixes for CVE-2026-45795 (2)

Vendor Advisories for CVE-2026-45795 (1)

Vendor Pages for CVE-2026-45795 (1)

IV. Related Vulnerabilities

Same product: jans
Same vendor: JanssenProject
Same weakness: CWE-347

V. Comments for CVE-2026-45795

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