{"id":"GHSA-h4x5-gvx6-3rwc","summary":"MantisBT has an Authorization Bypass that Allows Uploading Attachments to Private Issues via REST API","details":"### Impact\nMantisBT allows an authenticated user to upload attachments to private Issues they are not authorized to access.\n\n### Patches\n- b262b4d2835b81394d75356dead66e52a6275206\n\n### Workarounds\nNone.\n\n### Credits\nThanks to Vishal Shukla for discovering and responsibly reporting the issue.","aliases":["CVE-2026-34754"],"modified":"2026-09-10T03:50:46.965418816Z","published":"2026-05-11T19:33:06Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-05-11T19:33:06Z","nvd_published_at":"2026-05-20T00:16:34Z","cwe_ids":["CWE-284"]},"references":[{"type":"WEB","url":"https://github.com/mantisbt/mantisbt/security/advisories/GHSA-h4x5-gvx6-3rwc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34754"},{"type":"WEB","url":"https://github.com/mantisbt/mantisbt/commit/b262b4d2835b81394d75356dead66e52a6275206"},{"type":"PACKAGE","url":"https://github.com/mantisbt/mantisbt"},{"type":"WEB","url":"https://mantisbt.org/bugs/view.php?id=36976"}],"affected":[{"package":{"name":"mantisbt/mantisbt","ecosystem":"Packagist","purl":"pkg:composer/mantisbt/mantisbt"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.28.2"}]}],"versions":["2.10.0","2.10.1","2.11.0","2.11.1","2.12.0","2.12.1","2.12.2","2.13.0","2.13.1","2.13.2","2.14.0","2.15.0","2.15.1","2.16.0","2.16.1","2.17.0","2.17.1","2.17.2","2.18.0","2.18.1","2.19.0","2.19.1","2.20.0","2.20.1","2.21.0","2.21.1","2.21.2","2.21.3","2.22.0","2.22.1","2.22.2","2.23.0","2.23.1","2.24.0","2.24.1","2.24.2","2.24.3","2.24.4","2.24.5","2.25.0","2.25.1","2.25.2","2.25.3","2.25.4","2.25.5","2.25.6","2.25.7","2.25.8","2.26.0","2.26.1","2.26.2","2.26.3","2.26.4","2.27.0","2.27.1","2.27.2","2.27.3","2.28.0","2.28.1","2.3.0","2.3.1","2.3.2","2.3.3","2.4.0","2.4.1","2.4.2","2.5.0","2.5.1","2.5.2","2.6.0","2.7.0","2.7.1","2.8.0","2.8.1","2.9.0","2.9.1"],"database_specific":{"last_known_affected_version_range":"\u003c= 2.28.1","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-h4x5-gvx6-3rwc/GHSA-h4x5-gvx6-3rwc.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}