{"id":"CVE-2026-78433","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-78433","generatedAt":"2026-10-28T02:55:13.290Z","title":"An unauthenticated attacker who knows a private attachment's UUID can request it through a public repository's attachment path and retrieve its contents.","description":"Gitea's web attachment handler skips its cross-repository ownership check for attachments created before 16 January 2026 and checks permissions against the repository named in the request URL instead. An unauthenticated attacker who knows a private attachment's UUID can request it through a public repository's attachment path and retrieve its contents. This can expose issue and pull request attachments or release assets; the random attachment UUID must already be known to the attacker.","published":"2026-10-14T15:17:26.000Z","lastModified":"2026-10-18T14:16:57.000Z","status":"Deferred","sourceIdentifier":"88ee5874-cf24-4952-aea0-31affedb7ff2","cvss":{"version":"3.1","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-284","CWE-639","CWE-863","CWE-1220"],"affected":[],"epss":{"score":0.00369,"percentile":0.30531,"date":"2026-10-26","history":[{"date":"2026-10-15","score":0.00291,"percentile":0.20247}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.37%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-18T15:45:09.000Z","detail":{"from":null,"score":"5.9","severity":"MEDIUM","fromSeverity":null},"summary":"Now scored CVSS 5.9 MEDIUM."},{"kind":"new","label":"New CVE","at":"2026-10-14T15:17:26.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-14T15:17:25.637Z"},"summary":"New CVE, medium severity (CVSS 5.9)."}],"references":[{"url":"https://blog.gitea.com/release-of-1.27.3/","source":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/pull/39048","source":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/pull/39077","source":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.3","source":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-frpv-2xgv-wxpq","source":"88ee5874-cf24-4952-aea0-31affedb7ff2"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-78433","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}