{"answers":{"affected":"3 open source packages ship an affected version, including rack.","exploited":"There is no known exploitation of CVE-2026-125108 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-2026-125108 is a low-severity vulnerability in rack, published on 9 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-125108 and fix it if it is affected.\n\nWhat it is: CVE-2026-125108 is a low-severity vulnerability in rack, published on 9 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-125108 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-2026-125108/ (Markdown: https://insights.sbomify.com/CVE-2026-125108/index.md)","id":"CVE-2026-125108","markdown":"https://insights.sbomify.com/CVE-2026-125108/index.md","name":"CVE-2026-125108","record":{"aliases":["DEBIAN-CVE-2026-125108","GHSA-p8x9-v4hv-2w4g","UBUNTU-CVE-2026-125108"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":3.7,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-436","name":"Interpretation Conflict"}],"description":"Rack is a modular Ruby web server interface. Prior to 2.2.25, 3.1.23, and 3.2.8, Rack::Multipart::Parser.parse_boundary can skip a leading empty or quoted boundary parameter in a multipart Content-Type header and accept a later parameter. Rack can therefore parse a request body with a boundary that a conforming intermediary would not derive, allowing form fields or file uploads to reach an application without the intended proxy or web application firewall inspection. 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: Multipart boundary ambiguity guard in Rack::Multipart::Parser can be bypassed with a quoted boundary value, allowing WAF bypass","id":"CVE-2026-125108","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":null,"products":[],"type":null,"year":"2026"},"n_packages":3,"n_references":7,"next":{"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"},"nickname":null,"packages":[{"ecosystem":"RubyGems","fixed":["2.2.25"],"introduced":["0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-p8x9-v4hv-2w4g"},{"ecosystem":"RubyGems","fixed":["3.1.23"],"introduced":["3.0.0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-p8x9-v4hv-2w4g"},{"ecosystem":"RubyGems","fixed":["3.2.8"],"introduced":["3.2.0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-p8x9-v4hv-2w4g"}],"prev":{"headline":"Muhammara: NULL pointer dereference in LZWDecode filter when DecodeParms omits EarlyChange key","id":"CVE-2026-125107"},"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-2026-125108/"}