{"id":"CVE-2026-26276","aliases":["GHSA-vgjm-2cpf-4g7c","GO-2026-4627"],"url":"https://o3.security/vulnerability/CVE-2026-26276","summary":"Gogs: DOM-based XSS via milestone selection","details":"# Summary\n\nIt was confirmed in a test environment that an attacker can store an HTML/JavaScript payload in a repository’s **Milestone name**, and when another user selects that Milestone on the **New Issue** page (`/issues/new`), a **DOM-Based XSS** is triggered.\n\n# Impact\n\n* Theft of information accessible in the victim’s session.\n* Extraction of CSRF tokens and submission of state-changing requests with the victim’s privileges.\n* Repository operations performed with the victim’s privileges (Issue operations, settings changes, etc.).\n\n(The impact scope depends on the victim’s permission level.)\n\n# Remediation\n\nA fix is available at https://github.com/gogs/gogs/releases/tag/v0.14.2","published":"2026-03-05T18:51:13.530Z","modified":"2026-08-12T03:51:33.065921556Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"},"epss":{"score":0.00184,"percentile":0.08218,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"gogs.io/gogs","fixedVersion":null}],"fix":{"url":"https://github.com/gogs/gogs/pull/8178","label":"gogs/gogs#8178"},"references":[{"type":"WEB","url":"https://github.com/gogs/gogs/releases/tag/v0.14.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26276.json"},{"type":"ADVISORY","url":"https://github.com/gogs/gogs/security/advisories/GHSA-vgjm-2cpf-4g7c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26276"},{"type":"FIX","url":"https://github.com/gogs/gogs/pull/8178"},{"type":"WEB","url":"https://github.com/gogs/gogs/commit/9001a68cdda7bd9c078ffd6d1c4622905ac11e5c"},{"type":"PACKAGE","url":"https://github.com/gogs/gogs"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:33.065921556Z"}}