{"answers":{"affected":"3 open source packages ship an affected version, including rack.","exploited":"There is no known exploitation of CVE-2026-125110 in the wild and no public exploit code.","exposure":"","fix":"Upgrade rack to a fixed version for your release line: 2.2.25, 3.1.23 or 3.2.8.","what":"CVE-2026-125110 is a medium-severity vulnerability in rack, published on 9 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-125110 and fix it if it is affected.\n\nWhat it is: CVE-2026-125110 is a medium-severity vulnerability in rack, published on 9 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-125110 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- rack (RubyGems): affected all versions; fixed in 2.2.25\n- rack (RubyGems): affected from 3.0.0; fixed in 3.1.23\n- rack (RubyGems): affected from 3.2.0; fixed in 3.2.8\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-2026-125110/ (Markdown: https://insights.sbomify.com/CVE-2026-125110/index.md)","id":"CVE-2026-125110","markdown":"https://insights.sbomify.com/CVE-2026-125110/index.md","name":"CVE-2026-125110","record":{"aliases":["DEBIAN-CVE-2026-125110","GHSA-wvg4-6p58-3gh3","UBUNTU-CVE-2026-125110"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-180","name":"Incorrect Behavior Order: Validate Before Canonicalize"}],"description":"Rack is a modular Ruby web server interface. Prior to 2.2.25, 3.1.23, and 3.2.8, Rack::Static serves a path after Utils.clean_path_info normalization but evaluates header_rules against a path that is only URL-decoded. An unauthenticated attacker can request a known file through raw or percent-encoded dot segments and receive it without path-specific security headers such as Content-Disposition or Content-Security-Policy. Applications that do not use path-specific header_rules are not affected. This issue is fixed in versions 2.2.25, 3.1.23, and 3.2.8.","ecosystems":["RubyGems"],"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":"Rack: Rack::Static header_rules bypass via dot-segment normalization mismatch","id":"CVE-2026-125110","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":null,"products":[],"type":null,"year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"Rack: Multipart parsing allows DoS via unbounded scan buffer growth","id":"CVE-2026-125111"},"nickname":null,"packages":[{"ecosystem":"RubyGems","fixed":["2.2.25"],"introduced":["0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-wvg4-6p58-3gh3"},{"ecosystem":"RubyGems","fixed":["3.1.23"],"introduced":["3.0.0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-wvg4-6p58-3gh3"},{"ecosystem":"RubyGems","fixed":["3.2.8"],"introduced":["3.2.0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-wvg4-6p58-3gh3"}],"prev":{"headline":"Rack: Rack::Request#host_with_port (and #base_url / #url) return the raw invalid Host header — incomplete fix of CVE-2026-34835","id":"CVE-2026-125109"},"products":["rack"],"published":"2026-11-09","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":"2026-11-09","vendors":["rack"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-125110/"}