{"id":"CVE-2026-118658","state":"PUBLISHED","title":"Echo: Arbitrary Scheme Injection in WWWRedirect/NonWWWRedirect Middlewares via X-Forwarded-Proto","description":"Echo is a Go web framework. Prior to 4.15.2 and 5.1.1, Context.Scheme returns values from X-Forwarded-Proto, X-Forwarded-Protocol, or X-Url-Scheme without validating that they are supported web schemes. WWWRedirect and NonWWWRedirect use that value to construct a Location header, so an attacker controlling a forwarded scheme header can cause a redirect to use an arbitrary URI scheme. Exploitation requires an affected redirect middleware and user interaction with the response; the HTTPS-specific redirect variants hardcode HTTPS and are unaffected. This issue is fixed in 4.15.2 and 5.1.1.","publishedAt":"2026-10-28T20:17:11.083Z","updatedAt":"2026-10-28T20:17:11.083Z","severity":{"score":4.7,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["labstack echo"],"affected":[{"vendor":"labstack","product":"echo","versions":[{"version":">= 5.0.0, < 5.1.1","status":"affected"},{"version":"< 4.15.2","status":"affected"}]}],"references":["https://github.com/labstack/echo/security/advisories/GHSA-23wf-92cp-8pcj","https://github.com/labstack/echo/commit/ca4f38a474302aabee93c66bdd0052359882e181","https://github.com/labstack/echo/commit/d1d8ad3f99dd9b80542cd0c357d56a8916c515df","https://github.com/labstack/echo/releases/tag/v4.15.2","https://github.com/labstack/echo/releases/tag/v5.1.1"],"weaknesses":["CWE-601"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/118xxx/CVE-2026-118658.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-118658","state":"PUBLISHED","datePublished":"2026-10-28T20:17:11.083Z","dateUpdated":"2026-10-28T20:17:11.083Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-28T17:25:37.561Z"},"containers":{"cna":{"title":"Echo: Arbitrary Scheme Injection in WWWRedirect/NonWWWRedirect Middlewares via X-Forwarded-Proto","descriptions":[{"lang":"en","value":"Echo is a Go web framework. Prior to 4.15.2 and 5.1.1, Context.Scheme returns values from X-Forwarded-Proto, X-Forwarded-Protocol, or X-Url-Scheme without validating that they are supported web schemes. WWWRedirect and NonWWWRedirect use that value to construct a Location header, so an attacker controlling a forwarded scheme header can cause a redirect to use an arbitrary URI scheme. Exploitation requires an affected redirect middleware and user interaction with the response; the HTTPS-specific redirect variants hardcode HTTPS and are unaffected. This issue is fixed in 4.15.2 and 5.1.1."}],"affected":[{"vendor":"labstack","product":"echo","versions":[{"version":">= 5.0.0, < 5.1.1","status":"affected"},{"version":"< 4.15.2","status":"affected"}]}],"references":[{"url":"https://github.com/labstack/echo/security/advisories/GHSA-23wf-92cp-8pcj","name":"https://github.com/labstack/echo/security/advisories/GHSA-23wf-92cp-8pcj","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/labstack/echo/commit/ca4f38a474302aabee93c66bdd0052359882e181","name":"https://github.com/labstack/echo/commit/ca4f38a474302aabee93c66bdd0052359882e181","tags":["x_refsource_MISC"]},{"url":"https://github.com/labstack/echo/commit/d1d8ad3f99dd9b80542cd0c357d56a8916c515df","name":"https://github.com/labstack/echo/commit/d1d8ad3f99dd9b80542cd0c357d56a8916c515df","tags":["x_refsource_MISC"]},{"url":"https://github.com/labstack/echo/releases/tag/v4.15.2","name":"https://github.com/labstack/echo/releases/tag/v4.15.2","tags":["x_refsource_MISC"]},{"url":"https://github.com/labstack/echo/releases/tag/v5.1.1","name":"https://github.com/labstack/echo/releases/tag/v5.1.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-601","lang":"en","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-28T20:17:11.083Z"},"source":{"advisory":"GHSA-23wf-92cp-8pcj","discovery":"UNKNOWN"}}}}}