{"answers":{"affected":"2 open source packages ship an affected version, including github.com/getkin/kin-openapi.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100351 exists.","fix":"Upgrade github.com/getkin/kin-openapi to 0.147.0 or later.","what":"CVE-2026-100351 is a high-severity authentication bypass vulnerability in getkin kin-openapi, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-100351 and fix it if it is affected.\n\nWhat it is: CVE-2026-100351 is a high-severity authentication bypass vulnerability in getkin kin-openapi, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100351 exists.\n\nAffected packages and fixed versions:\n- github.com/getkin/kin-openapi (Go): affected from 0.144.0; fixed in 0.147.0\n- github.com/getkin/kin-openapi (Go): affected from 0.144.0; fixed in 0.147.0\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-2026-100351/ (Markdown: https://insights.sbomify.com/CVE-2026-100351/index.md)","id":"CVE-2026-100351","markdown":"https://insights.sbomify.com/CVE-2026-100351/index.md","name":"CVE-2026-100351","record":{"aliases":["CLEANSTART-2026-ZP83138","ECHO-5281-32ff-334d","GHSA-23vg-4cjm-66q5","MINI-339f-pcx8-mr64","MINI-372g-5w67-ghx3","MINI-46rp-3rvv-vj79","MINI-4hfg-2p9v-gr79","MINI-6xcc-8pmr-v92w","MINI-838c-5h5m-w2rx","MINI-9725-mw36-x76q","MINI-9gq7-qc8j-vrwj","MINI-f48g-7w3r-cf56","MINI-gq2w-w3m9-rjcq","MINI-jj94-75f2-9hr9","MINI-m8q7-h4cf-mpj7","MINI-rm8j-2vm2-hc9v","MINI-v5pc-9jg9-x3v4","MINI-vq7f-m5rf-qxj6","MINI-wj8f-xq45-xxvf","UBUNTU-CVE-2026-100351"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Go OpenAPI library","requires_auth":"none","summary":"Attackers can bypass authentication in kin-openapi by exploiting path decoding mismatches between validation and routing, accessing protected endpoints without credentials.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-436","name":"Interpretation Conflict"},{"id":"CWE-289","name":"Authentication Bypass by Alternate Name"}],"description":"kin-openapi is a Go project for handling OpenAPI files. From 0.144.0 until 0.147.0, openapi3filter.ValidationHandler validates an operation selected from decoded URL.Path while a downstream gorilla/mux router configured with UseEncodedPath can dispatch a different operation selected from URL.RawPath. When a public exact route and a protected parameterized route use the same method and overlap after decoding, an unauthenticated remote request containing an encoded path separator can be validated as public and then dispatched to the protected handler without invoking the configured AuthenticationFunc. The reachable path parameter is constrained to an encoded representation that decodes to the public literal route, and proxies that canonicalize the URI before forwarding prevent this specific mismatch. This issue is fixed in version 0.147.0.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"kin-openapi: ValidationHandler security-requirement bypass via encoded-path operation confusion","id":"CVE-2026-100351","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"kin-openapi: YAML NaN/Inf Values Bypass Built-in Guards and Panic via OAS 3.1 Validation Path","id":"CVE-2026-100352"},"packages":[{"ecosystem":"Go","fixed":["0.147.0"],"introduced":["0.144.0"],"last_affected":[],"package":"github.com/getkin/kin-openapi","purl":null,"source":"GHSA-23vg-4cjm-66q5"},{"ecosystem":"Go","fixed":["0.147.0"],"introduced":["0.144.0"],"last_affected":[],"package":"github.com/getkin/kin-openapi","purl":"pkg:golang/github.com/getkin/kin-openapi","source":"GHSA-23vg-4cjm-66q5"}],"prev":{"headline":"kin-openapi deepObject query decoding repeatedly compiles an invariant regular expression","id":"CVE-2026-100350"},"products":["kin-openapi"],"published":"2026-10-15","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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-15","vendors":["getkin"]},"summary":"Attackers can bypass authentication in kin-openapi by exploiting path decoding mismatches between validation and routing, accessing protected endpoints without credentials.","url":"https://insights.sbomify.com/CVE-2026-100351/"}