{"answers":{"affected":"4 open source packages ship an affected version, including github.com/labstack/echo/v4 and github.com/labstack/echo/v5.","exploited":"There is no known exploitation of CVE-2026-118655 in the wild and no public exploit code.","fix":"Upgrade github.com/labstack/echo/v4 to 4.15.3 or later.","what":"CVE-2026-118655 is a medium-severity vulnerability in labstack echo, published on 28 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-118655 and fix it if it is affected.\n\nWhat it is: CVE-2026-118655 is a medium-severity vulnerability in labstack echo, published on 28 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-118655 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/labstack/echo/v4 (Go): affected all versions; fixed in 4.15.3\n- github.com/labstack/echo/v4 (Go): affected all versions; fixed in 4.15.3\n- github.com/labstack/echo/v5 (Go): affected all versions; fixed in 5.2.0\n- github.com/labstack/echo/v5 (Go): affected all versions; fixed in 5.2.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-118655/ (Markdown: https://insights.sbomify.com/CVE-2026-118655/index.md)","id":"CVE-2026-118655","markdown":"https://insights.sbomify.com/CVE-2026-118655/index.md","name":"CVE-2026-118655","record":{"aliases":["DEBIAN-CVE-2026-118655","GHSA-xwq5-6cqp-vx96","UBUNTU-CVE-2026-118655"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-174","name":"Double Decoding of the Same Data"}],"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Echo: Static Middleware Double-Unescape Path Traversal","id":"CVE-2026-118655","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":null,"year":"2026"},"n_packages":4,"n_references":7,"next":{"headline":"Echo: Open Redirect via Control-Character Prefix Defeating sanitizeURI","id":"CVE-2026-118656"},"packages":[{"ecosystem":"Go","fixed":["4.15.3"],"introduced":["0"],"last_affected":[],"package":"github.com/labstack/echo/v4","purl":null,"source":"GHSA-xwq5-6cqp-vx96"},{"ecosystem":"Go","fixed":["4.15.3"],"introduced":["0"],"last_affected":[],"package":"github.com/labstack/echo/v4","purl":"pkg:golang/github.com/labstack/echo/v4","source":"GHSA-xwq5-6cqp-vx96"},{"ecosystem":"Go","fixed":["5.2.0"],"introduced":["0"],"last_affected":[],"package":"github.com/labstack/echo/v5","purl":null,"source":"GHSA-xwq5-6cqp-vx96"},{"ecosystem":"Go","fixed":["5.2.0"],"introduced":["0"],"last_affected":[],"package":"github.com/labstack/echo/v5","purl":"pkg:golang/github.com/labstack/echo/v5","source":"GHSA-xwq5-6cqp-vx96"}],"prev":{"headline":"Echo static file middleware route protection bypass via encoded dot-dot traversal","id":"CVE-2026-118654"},"products":["echo"],"published":"2026-10-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["labstack"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-118655/"}