{"answers":{"affected":"2 open source packages ship an affected version, including github.com/labstack/echo/v4.","exploited":"There is no known exploitation of CVE-2026-118261 in the wild and no public exploit code.","fix":"Upgrade github.com/labstack/echo/v4 to 4.16.1 or later.","what":"CVE-2026-118261 is a high-severity vulnerability in labstack echo, published on 28 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-118261 and fix it if it is affected.\n\nWhat it is: CVE-2026-118261 is a high-severity vulnerability in labstack echo, published on 28 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-118261 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; fixed in 4.16.1\n- github.com/labstack/echo/v4 (Go): affected from 4.0.0; fixed in 4.16.1\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-2026-118261/ (Markdown: https://insights.sbomify.com/CVE-2026-118261/index.md)","id":"CVE-2026-118261","markdown":"https://insights.sbomify.com/CVE-2026-118261/index.md","name":"CVE-2026-118261","record":{"aliases":["DEBIAN-CVE-2026-118261","ECHO-ebd5-7305-625a","GHSA-h7wr-284f-5qvc","ROOT-APP-GOBINARY-GHSA-h7wr-284f-5qvc","UBUNTU-CVE-2026-118261"],"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-409","name":"Improper Handling of Highly Compressed Data (Data Amplification)"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Echo is a Go web framework. From 4.0.0 until 4.16.1, Echo v4's opt-in Decompress middleware exposes a gzip-decoded request stream without limiting its expanded size. A small compressed request can expand into a very large body when a handler reads or binds it, consuming excessive memory or CPU and allowing repeated or concurrent requests to cause denial of service. The middleware is not enabled by default, and limiting only the compressed request size does not bound the decoded size. This issue is fixed in 4.16.1.","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: Decompress permits unbounded gzip expansion in v4","id":"CVE-2026-118261","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Echo: WebSocket proxy can retain connections and handlers after client disconnect","id":"CVE-2026-118262"},"packages":[{"ecosystem":"Go","fixed":["4.16.1"],"introduced":["4.0.0"],"last_affected":[],"package":"github.com/labstack/echo/v4","purl":null,"source":"GHSA-h7wr-284f-5qvc"},{"ecosystem":"Go","fixed":["4.16.1"],"introduced":["4.0.0"],"last_affected":[],"package":"github.com/labstack/echo/v4","purl":"pkg:golang/github.com/labstack/echo/v4","source":"GHSA-h7wr-284f-5qvc"}],"prev":{"headline":"Echo: BodyDump captures request and response bodies without size limits in v4","id":"CVE-2026-118260"},"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-2026-118261/"}