{"id":"CVE-2026-118655","state":"PUBLISHED","title":"Echo: Static Middleware Double-Unescape Path Traversal","description":"Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, middleware.Static can decode an already decoded Request.URL.Path a second time. Double-encoded separators can consequently be reconstructed before filesystem resolution. This can reach a file under a guarded route when the static middleware is registered globally. This issue is fixed in 4.15.3 and 5.2.0.","publishedAt":"2026-10-28T20:03:56.897Z","updatedAt":"2026-10-29T18:29:50.622Z","severity":{"score":5.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["labstack echo"],"affected":[{"vendor":"labstack","product":"echo","versions":[{"version":">= 5.0.0, < 5.2.0","status":"affected"},{"version":"< 4.15.3","status":"affected"}]}],"references":["https://github.com/labstack/echo/security/advisories/GHSA-xwq5-6cqp-vx96","https://github.com/labstack/echo/issues/2599","https://github.com/labstack/echo/pull/3006","https://github.com/labstack/echo/commit/a9ede66a5a7196411131beb1ee801e75bbaf7ac6","https://github.com/labstack/echo/commit/c3fa2a27ff92b2b8db360de614f999ef1da24725","https://github.com/labstack/echo/releases/tag/v4.15.3","https://github.com/labstack/echo/releases/tag/v5.2.0"],"weaknesses":["CWE-174"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/118xxx/CVE-2026-118655.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-118655","state":"PUBLISHED","datePublished":"2026-10-28T20:03:56.897Z","dateUpdated":"2026-10-29T18:29:50.622Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-28T17:25:37.561Z"},"containers":{"cna":{"title":"Echo: Static Middleware Double-Unescape Path Traversal","descriptions":[{"lang":"en","value":"Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, middleware.Static can decode an already decoded Request.URL.Path a second time. Double-encoded separators can consequently be reconstructed before filesystem resolution. This can reach a file under a guarded route when the static middleware is registered globally. This issue is fixed in 4.15.3 and 5.2.0."}],"affected":[{"vendor":"labstack","product":"echo","versions":[{"version":">= 5.0.0, < 5.2.0","status":"affected"},{"version":"< 4.15.3","status":"affected"}]}],"references":[{"url":"https://github.com/labstack/echo/security/advisories/GHSA-xwq5-6cqp-vx96","name":"https://github.com/labstack/echo/security/advisories/GHSA-xwq5-6cqp-vx96","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/labstack/echo/issues/2599","name":"https://github.com/labstack/echo/issues/2599","tags":["x_refsource_MISC"]},{"url":"https://github.com/labstack/echo/pull/3006","name":"https://github.com/labstack/echo/pull/3006","tags":["x_refsource_MISC"]},{"url":"https://github.com/labstack/echo/commit/a9ede66a5a7196411131beb1ee801e75bbaf7ac6","name":"https://github.com/labstack/echo/commit/a9ede66a5a7196411131beb1ee801e75bbaf7ac6","tags":["x_refsource_MISC"]},{"url":"https://github.com/labstack/echo/commit/c3fa2a27ff92b2b8db360de614f999ef1da24725","name":"https://github.com/labstack/echo/commit/c3fa2a27ff92b2b8db360de614f999ef1da24725","tags":["x_refsource_MISC"]},{"url":"https://github.com/labstack/echo/releases/tag/v4.15.3","name":"https://github.com/labstack/echo/releases/tag/v4.15.3","tags":["x_refsource_MISC"]},{"url":"https://github.com/labstack/echo/releases/tag/v5.2.0","name":"https://github.com/labstack/echo/releases/tag/v5.2.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-174","lang":"en","description":"CWE-174: Double Decoding of the Same Data","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-28T20:03:56.897Z"},"source":{"advisory":"GHSA-xwq5-6cqp-vx96","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-29T18:29:35.386733Z","id":"CVE-2026-118655","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-29T18:29:50.622Z"}}]}}}