---
title: "GHSA-hx5q-v6pj-533r: SAML authentication bypass due to missing validation on unsigned SAML messages"
url: https://erroneo.us/security/ghsa/GHSA-hx5q-v6pj-533r/
description: "GHSA-hx5q-v6pj-533r (critical, Maven): SAML authentication bypass due to missing validation on unsigned SAML messages. Impact When SAML is used as the…"
type: advisory
section: "Security Digest"
date_published: 2024-02-26
date_modified: 2026-03-15
publisher: erroneo.us
author: erroneo.us Security Desk
ghsa: "GHSA-hx5q-v6pj-533r"
license: All rights reserved. Quote with attribution and a link.
---

# GHSA-hx5q-v6pj-533r: SAML authentication bypass due to missing validation on unsigned SAML messages

## Affected packages

- Maven `com.linecorp.centraldogma:centraldogma-server-auth-saml` <= 0.64.2 → fixed: 0.64.3

## Details

Impact When SAML is used as the authentication mechanism, Central Dogma accepts unsigned SAML messages (assertions, logout requests, etc.) as they are, rather than rejecting them by default. As a result, an attacker can forge a SAML message to authenticate themselves, despite the fact that such an unsigned SAML message should be rejected. Patches The vulnerability has been patched in Central Dogma 0.64.3 by updating its Armeria dependency to 1.27.2. All users who use SAML as the authentication mechanism must upgrade from 0.64.3 or later. Workarounds A user can manually upgrade the armeria-saml module with the one from Armeria 1.27.2 or later, either by replacing the JAR in the Central Dogma distribution or by updating the dependency tree of the build. References SamlMessageUtil.validateSignature()

## Sources

- [GitHub Advisory GHSA-hx5q-v6pj-533r](https://github.com/advisories/GHSA-hx5q-v6pj-533r)
- [github.com](https://github.com/line/armeria/security/advisories/GHSA-4m6j-23p2-8c54)
- [github.com](https://github.com/line/centraldogma/security/advisories/GHSA-hx5q-v6pj-533r)
- [github.com](https://github.com/line/centraldogma/commit/16903426be2e954c050b3ee47b8c38ee3218f0eb)
- [github.com](https://github.com/line/centraldogma/commit/16903426be2e954c050b3ee47b8c38ee3218f0ebxz)
- [github.com](https://github.com/line/centraldogma/releases/tag/centraldogma-0.64.3)

---
Source page: https://erroneo.us/security/ghsa/GHSA-hx5q-v6pj-533r/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt