{"id":"CVE-2026-34754","aliases":["GHSA-h4x5-gvx6-3rwc"],"url":"https://o3.security/vulnerability/CVE-2026-34754","summary":"MantisBT allows unauthorized users to upload attachments to restricted 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.","published":"2026-05-19T23:05:27.818Z","modified":"2026-08-12T03:51:16.367460085Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},"epss":{"score":0.00248,"percentile":0.1635,"asOf":"2026-08-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"mantisbt/mantisbt","fixedVersion":"2.28.2"}],"fix":{"url":"https://github.com/mantisbt/mantisbt/commit/b262b4d2835b81394d75356dead66e52a6275206","label":"mantisbt/mantisbt@b262b4d"},"references":[{"type":"WEB","url":"https://mantisbt.org/bugs/view.php?id=36976"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34754.json"},{"type":"ADVISORY","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":"FIX","url":"https://github.com/mantisbt/mantisbt/commit/b262b4d2835b81394d75356dead66e52a6275206"},{"type":"PACKAGE","url":"https://github.com/mantisbt/mantisbt"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:16.367460085Z"}}