{"answers":{"affected":"2 open source packages ship an affected version, including github.com/labstack/echo/v5.","exploited":"There is no known exploitation of CVE-2026-118263 in the wild and no public exploit code.","fix":"Upgrade github.com/labstack/echo/v5 to 5.4.1 or later.","what":"CVE-2026-118263 is a medium-severity vulnerability in labstack echo, published on 28 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-118263 and fix it if it is affected.\n\nWhat it is: CVE-2026-118263 is a medium-severity vulnerability in labstack echo, published on 28 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-118263 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/labstack/echo/v5 (Go): affected from 5.0.0; fixed in 5.4.1\n- github.com/labstack/echo/v5 (Go): affected from 5.0.0; fixed in 5.4.1\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-2026-118263/ (Markdown: https://insights.sbomify.com/CVE-2026-118263/index.md)","id":"CVE-2026-118263","markdown":"https://insights.sbomify.com/CVE-2026-118263/index.md","name":"CVE-2026-118263","record":{"aliases":["ECHO-89c4-2f2d-3bfb","GHSA-x9ff-22gv-65f4","UBUNTU-CVE-2026-118263"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-252","name":"Unchecked Return Value"}],"description":"Echo is a Go web framework. From 5.0.0 until 5.4.1, Echo v5's BodyDump middleware can discard a BodyLimit overflow error for an unknown-length request when BodyDump's capture limit is below the BodyLimit threshold. BodyDump drains the remaining body while ignoring read errors and replaces it with the captured prefix, so an HTTP/1.1 chunked request can be truncated and processed successfully even though the original body exceeded the configured limit. Known-length requests rejected before BodyDump runs are unaffected, and the issue does not establish a general authentication bypass or denial of service. This issue is fixed in 5.4.1.","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: BodyDump can discard BodyLimit overflow errors for unknown-length requests","id":"CVE-2026-118263","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"Echo: Rejected WebSocket upgrades can bypass Echo route-level access controls","id":"CVE-2026-118264"},"packages":[{"ecosystem":"Go","fixed":["5.4.1"],"introduced":["5.0.0"],"last_affected":[],"package":"github.com/labstack/echo/v5","purl":null,"source":"GHSA-x9ff-22gv-65f4"},{"ecosystem":"Go","fixed":["5.4.1"],"introduced":["5.0.0"],"last_affected":[],"package":"github.com/labstack/echo/v5","purl":"pkg:golang/github.com/labstack/echo/v5","source":"GHSA-x9ff-22gv-65f4"}],"prev":{"headline":"Echo: WebSocket proxy can retain connections and handlers after client disconnect","id":"CVE-2026-118262"},"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-28","vendors":["labstack"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-118263/"}