{"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-2026-118651 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-118651 is a medium-severity vulnerability in labstack echo, published on 28 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-118651 and fix it if it is affected.\n\nWhat it is: CVE-2026-118651 is a medium-severity vulnerability in labstack echo, published on 28 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-118651 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/labstack/echo/v4 (Go): affected from 4.0.0 up to 4.16.2; no fix listed\n- github.com/labstack/echo/v4 (Go): affected from 4.0.0 up to 4.16.2; no fix listed\n- github.com/labstack/echo/v5 (Go): affected all versions; fixed in 5.4.0\n- github.com/labstack/echo/v5 (Go): affected all versions; fixed in 5.4.0\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-2026-118651/ (Markdown: https://insights.sbomify.com/CVE-2026-118651/index.md)","id":"CVE-2026-118651","markdown":"https://insights.sbomify.com/CVE-2026-118651/index.md","name":"CVE-2026-118651","record":{"aliases":["DEBIAN-CVE-2026-118651","GHSA-99jh-6h7p-pp36","UBUNTU-CVE-2026-118651"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-346","name":"Origin Validation Error"}],"description":"Echo is a Go web framework. From 4.0.0 until 5.4.0, the Proxy middleware can preserve an attacker-supplied X-Real-IP header and forward it to an upstream service when Echo.IPExtractor is not configured. A remote client can therefore make upstream services receive a spoofed client address, undermining IP-based access controls, rate limiting, audit logging, or geographic restrictions that trust Echo's forwarded identity. This issue is fixed in Echo 5.4.0.","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: Reverse Proxy Forwards Attacker-Supplied X-Real-IP to Upstream by Default","id":"CVE-2026-118651","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":null,"year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Echo: Reflected Cross-Site Scripting (XSS) via unsanitized JSONP callback in Context.JSONP / Context.JSONPBlob","id":"CVE-2026-118652"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["4.0.0"],"last_affected":["4.16.2"],"package":"github.com/labstack/echo/v4","purl":null,"source":"GHSA-99jh-6h7p-pp36"},{"ecosystem":"Go","fixed":[],"introduced":["4.0.0"],"last_affected":["4.16.2"],"package":"github.com/labstack/echo/v4","purl":"pkg:golang/github.com/labstack/echo/v4","source":"GHSA-99jh-6h7p-pp36"},{"ecosystem":"Go","fixed":["5.4.0"],"introduced":["0"],"last_affected":[],"package":"github.com/labstack/echo/v5","purl":null,"source":"GHSA-99jh-6h7p-pp36"},{"ecosystem":"Go","fixed":["5.4.0"],"introduced":["0"],"last_affected":[],"package":"github.com/labstack/echo/v5","purl":"pkg:golang/github.com/labstack/echo/v5","source":"GHSA-99jh-6h7p-pp36"}],"prev":{"headline":"Echo: middleware.Static: `%2F`-encoded path bypasses route/group middleware guarding a statically-served path","id":"CVE-2026-118650"},"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["labstack"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-118651/"}