{"answers":{"affected":"2 open source packages ship an affected version, including github.com/go-chi/chi/v5.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-114437 exists.","fix":"Upgrade github.com/go-chi/chi/v5 to 5.4.0 or later.","what":"CVE-2026-114437 is a medium-severity vulnerability in go-chi chi, published on 21 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-114437 and fix it if it is affected.\n\nWhat it is: CVE-2026-114437 is a medium-severity vulnerability in go-chi chi, published on 21 Oct 2026. \nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-114437 exists.\n\nAffected packages and fixed versions:\n- github.com/go-chi/chi/v5 (Go): affected all versions; fixed in 5.4.0\n- github.com/go-chi/chi/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-2026-114437/ (Markdown: https://insights.sbomify.com/CVE-2026-114437/index.md)","id":"CVE-2026-114437","markdown":"https://insights.sbomify.com/CVE-2026-114437/index.md","name":"CVE-2026-114437","record":{"aliases":["DEBIAN-CVE-2026-114437","ECHO-461c-5390-d147","GHSA-j6qf-3m9c-vwj3","MINI-4fmj-378w-c278","MINI-5mfm-3xjf-f349","MINI-78vx-r3r5-v277","MINI-87cp-rxfp-mq2r","MINI-cr6x-64f6-cfwx","MINI-p7hg-jf77-p3m2","MINI-w98x-4pfr-2w84","UBUNTU-CVE-2026-114437","openSUSE-SU-2026:12290-1"],"analysis":null,"analysis_generated_by":null,"assigner":"tenable","cpe":[],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-348","name":"Use of Less Trusted Source"}],"description":"In the Golang Chi web framework, the ClientIPFromXFF middleware skips any X-Forwarded-For entry in a configured trusted CIDR but never verifies that the direct TCP peer in http.Request.RemoteAddr belongs to that CIDR. A client that can reach the Go server directly can therefore append a trusted-looking proxy address and choose the client IP returned by middleware.GetClientIP.\n\nThis issue affects chi before 5.4.0.","ecosystems":["Go","openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Chi Client IP Spoofing in ClientIPFromXFF via X-Forwarded-For","id":"CVE-2026-114437","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":null,"year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Keycloak-services: keycloak-services: required otp enrollment bypassed via update user locale required action ordering","id":"CVE-2026-114438"},"packages":[{"ecosystem":"Go","fixed":["5.4.0"],"introduced":["0"],"last_affected":[],"package":"github.com/go-chi/chi/v5","purl":null,"source":"GHSA-j6qf-3m9c-vwj3"},{"ecosystem":"Go","fixed":["5.4.0"],"introduced":["0"],"last_affected":[],"package":"github.com/go-chi/chi/v5","purl":"pkg:golang/github.com/go-chi/chi/v5","source":"GHSA-j6qf-3m9c-vwj3"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["2.1.2-2.1"],"introduced":["0"],"last_affected":[],"package":"hauler","purl":"pkg:rpm/opensuse/hauler\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:12290-1"}],"prev":{"headline":"WP VR 8.5.49 - 9.0.2 - Contributor+ Stored XSS via Hotspot Content","id":"CVE-2026-114429"},"products":["chi"],"published":"2026-10-21","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":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-21","vendors":["go-chi"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-114437/"}