{"id":"GHSA-72v2-v53v-4qmm","summary":"github.com/mattermost/mattermost/server/public vulnerable to path traversal in API route construction","details":"The Mattermost Go module github.com/mattermost/mattermost/server/public versions \u003c v0.1.22 fail to validate path parameters when constructing API route paths which allows an attacker to redirect API calls to unintended endpoints via crafted IDs containing path traversal components. Mattermost Advisory ID: MMSA-2025-00532","aliases":["CVE-2026-13426"],"modified":"2026-11-03T22:15:11.168318831Z","published":"2026-06-26T15:32:13Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-11-03T22:04:52Z","nvd_published_at":"2026-06-26T14:17:03Z","cwe_ids":["CWE-22"],"severity":"MODERATE"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13426"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/34499"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/39305"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/2b075c9b74effbb56f3769f1bdec161eef4c6808"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/64c16ff0ea7f455ee648bfe906407def1274fbd3"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/releases/tag/server/public/v0.1.22"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"affected":[{"package":{"name":"github.com/mattermost/mattermost/server/public","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost/server/public"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.1.22"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-72v2-v53v-4qmm/GHSA-72v2-v53v-4qmm.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"}]}