{"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-2026-118262 in the wild and no public exploit code.","fix":"Upgrade github.com/labstack/echo/v4 to 4.16.1 or later.","what":"CVE-2026-118262 is a high-severity vulnerability in labstack echo, published on 28 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-118262 and fix it if it is affected.\n\nWhat it is: CVE-2026-118262 is a high-severity vulnerability in labstack echo, published on 28 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-118262 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/labstack/echo/v4 (Go): affected from 4.15.0; fixed in 4.16.1\n- github.com/labstack/echo/v4 (Go): affected from 4.15.0; fixed in 4.16.1\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-2026-118262/ (Markdown: https://insights.sbomify.com/CVE-2026-118262/index.md)","id":"CVE-2026-118262","markdown":"https://insights.sbomify.com/CVE-2026-118262/index.md","name":"CVE-2026-118262","record":{"aliases":["DEBIAN-CVE-2026-118262","ECHO-ec06-f360-e7e1","GHSA-9969-6676-49h5","ROOT-APP-GOBINARY-GHSA-9969-6676-49h5","UBUNTU-CVE-2026-118262"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-772","name":"Missing Release of Resource after Effective Lifetime"}],"description":"Echo is a Go web framework. From 4.15.0 until 4.16.1 and 5.4.1, Echo's Proxy middleware can retain a handler, copy goroutines, and network connections after a WebSocket client disconnects when the upstream keeps its connection open. The raw proxy waits for both copy directions without reliably closing the peer connection when one direction ends, including when a rejected upgrade response uses HTTP keep-alive. Repeated connections can accumulate resources and cause denial of service, depending on proxy-route accessibility, upstream behavior, and connection deadlines. This issue is fixed in 4.16.1 and 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: WebSocket proxy can retain connections and handlers after client disconnect","id":"CVE-2026-118262","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":null,"year":"2026"},"n_packages":4,"n_references":5,"next":{"headline":"Echo: BodyDump can discard BodyLimit overflow errors for unknown-length requests","id":"CVE-2026-118263"},"packages":[{"ecosystem":"Go","fixed":["4.16.1"],"introduced":["4.15.0"],"last_affected":[],"package":"github.com/labstack/echo/v4","purl":null,"source":"GHSA-9969-6676-49h5"},{"ecosystem":"Go","fixed":["4.16.1"],"introduced":["4.15.0"],"last_affected":[],"package":"github.com/labstack/echo/v4","purl":"pkg:golang/github.com/labstack/echo/v4","source":"GHSA-9969-6676-49h5"},{"ecosystem":"Go","fixed":["5.4.1"],"introduced":["5.0.0"],"last_affected":[],"package":"github.com/labstack/echo/v5","purl":null,"source":"GHSA-9969-6676-49h5"},{"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-9969-6676-49h5"}],"prev":{"headline":"Echo: Decompress permits unbounded gzip expansion in v4","id":"CVE-2026-118261"},"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-2026-118262/"}