{"id":"CVE-2024-1735","aliases":["GHSA-4m6j-23p2-8c54"],"url":"https://o3.security/vulnerability/CVE-2024-1735","summary":"Armeria SAML authentication bypass due to missing validation on unsigned SAML messages","details":"### Impact\n\nThe SAML implementation provided by `armeria-saml` currently 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.\n\n### Patches\n\nThe vulnerability has been patched in Armeria version 1.27.2. All users who rely on `armeria-saml` older than version 1.27.2 must upgrade to 1.27.2 or later.\n\n### Workarounds\n\nThere is no known workaround for this vulnerability.\n\n### References\n\n[`SamlMessageUtil.validateSignature()`](https://github.com/line/armeria/blob/0efc776988d71be4da6e506ec8a33c2b7b43f567/saml/src/main/java/com/linecorp/armeria/server/saml/SamlMessageUtil.java#L160-L163)","published":"2024-02-26T07:25:42.406Z","modified":"2026-10-28T02:31:07.139357566Z","cvss":{"score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"com.linecorp.armeria:armeria-saml","fixedVersion":"1.27.2"}],"fix":{"url":"https://github.com/line/armeria/commit/b2aa9f49b46a7b0e03d8b8d753809cd1e8e2016c","label":"line/armeria@b2aa9f4"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/1xxx/CVE-2024-1735.json"},{"type":"ADVISORY","url":"https://github.com/line/armeria/security/advisories/GHSA-4m6j-23p2-8c54"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-1735"},{"type":"WEB","url":"https://github.com/line/armeria/commit/b2aa9f49b46a7b0e03d8b8d753809cd1e8e2016c"},{"type":"PACKAGE","url":"https://github.com/line/armeria"},{"type":"WEB","url":"https://github.com/line/armeria/blob/0efc776988d71be4da6e506ec8a33c2b7b43f567/saml/src/main/java/com/linecorp/armeria/server/saml/SamlMessageUtil.java#L160-L163"},{"type":"WEB","url":"https://github.com/line/armeria/releases/tag/armeria-1.27.2"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:31:07.139357566Z"}}