{"id":"CVE-2026-82402","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-82402","generatedAt":"2026-10-28T04:17:06.155Z","title":"Prior to 0.15.0+dev, an unauthenticated attacker can provide a backslash-containing target to the /redirect endpoint, and similar post-action redirect flows are also affected. internal/urlx/urlx.go IsSameSite validates a normalized form of the target…","description":"Gogs is an open source self-hosted Git service. Prior to 0.15.0+dev, an unauthenticated attacker can provide a backslash-containing target to the /redirect endpoint, and similar post-action redirect flows are also affected. internal/urlx/urlx.go IsSameSite validates a normalized form of the target while cmd/gogs/internal/web/web.go getRedirect and other callers use the original value in the Location response. This backslash normalization mismatch lets browsers interpret the Location value as a scheme-relative external URL, allowing links on a trusted Gogs domain to redirect victims to attacker-controlled content for phishing. This vulnerability is fixed in 0.15.0+dev.","published":"2026-10-14T19:17:22.000Z","lastModified":"2026-10-20T02:17:12.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":5.3,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-601"],"affected":[],"epss":{"score":0.00435,"percentile":0.37602,"date":"2026-10-27","history":[{"date":"2026-10-15","score":0.00338,"percentile":0.25551}]},"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 (0.43%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-14T19:17:22.000Z","detail":{"score":"5.3","severity":"MEDIUM","publishedAt":"2026-10-14T19:17:21.660Z"},"summary":"New CVE, medium severity (CVSS 5.3)."}],"references":[{"url":"https://github.com/gogs/gogs/blob/main/CHANGELOG.md#0150dev-main","source":"security-advisories@github.com"},{"url":"https://github.com/gogs/gogs/commit/0aa820e6d572771551871c0b5f5f32dffc565e3e","source":"security-advisories@github.com"},{"url":"https://github.com/gogs/gogs/pull/8391","source":"security-advisories@github.com"},{"url":"https://github.com/gogs/gogs/security/advisories/GHSA-3g28-2vwg-gxq6","source":"security-advisories@github.com"},{"url":"https://github.com/gogs/gogs/security/advisories/GHSA-3g28-2vwg-gxq6","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-82402","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."}