{"answers":{"affected":"1 open source package ship an affected version, including loofah.","exploited":"There is no known exploitation of CVE-2026-126205 in the wild and no public exploit code.","exposure":"An affected version is exposed as installed. No special setting or call is needed.","fix":"Upgrade loofah to 2.25.3 or later.","what":"CVE-2026-126205 is a medium-severity denial of service vulnerability in flavorjones loofah, published on 12 Nov 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-2026-126205 and fix it if it is affected.\n\nWhat it is: CVE-2026-126205 is a medium-severity denial of service vulnerability in flavorjones loofah, published on 12 Nov 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-126205 in the wild and no public exploit code.\nExposure: An affected version is exposed as installed. No special setting or call is needed.\n\nAffected packages and fixed versions:\n- loofah (RubyGems): affected all versions; fixed in 2.25.3\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-2026-126205/ (Markdown: https://insights.sbomify.com/CVE-2026-126205/index.md)","id":"CVE-2026-126205","markdown":"https://insights.sbomify.com/CVE-2026-126205/index.md","name":"CVE-2026-126205","record":{"aliases":["GHSA-mf2j-8f84-cc9q"],"analysis":{"component_type":"library","exploitable_when_present":false,"fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby HTML sanitizer","requires_auth":"none","requires_specific_call":false,"summary":"Attackers can submit SVG references with long whitespace to cause quadratic CPU use in Loofah sanitization; Ruby apps using Loofah should care.","user_interaction":"not_required","vuln_class":"denial_of_service","vulnerable_functions":[]},"analysis_generated_by":"sbomify/insights-2b-fp8","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:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"},{"id":"CWE-1333","name":"Inefficient Regular Expression Complexity"}],"description":"Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.3, the Loofah HTML5 sanitizer checks href and xlink:href on elements in SVG_ALLOW_LOCAL_HREF with a regular expression whose line anchor and newline-matching whitespace cause an all-whitespace value to be rescanned from every line start. An attacker can submit an SVG reference element with a long multiline-whitespace attribute and consume CPU quadratically during sanitization. CRuby 3.1 and earlier and JRuby are affected, while CRuby 3.2 and later uses linear-time regular-expression matching. The default safelist reaches the vulnerable check without a configuration change. This issue is fixed in version 2.25.3.","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":"Loofah: Regular expression denial of service in the SVG local-reference check","id":"CVE-2026-126205","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":1,"n_references":4,"next":{"headline":"Loofah allowed_uri? treats data:text/html as safe text/plain","id":"CVE-2026-126206"},"nickname":null,"packages":[{"ecosystem":"RubyGems","fixed":["2.25.3"],"introduced":["0"],"last_affected":[],"package":"loofah","purl":null,"source":"GHSA-mf2j-8f84-cc9q"}],"prev":{"headline":"Security feature bypass in express-rate-limit","id":"CVE-2026-126204"},"products":["loofah"],"published":"2026-11-12","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":"2026-11-12","vendors":["flavorjones"]},"summary":"Attackers can submit SVG references with long whitespace to cause quadratic CPU use in Loofah sanitization; Ruby apps using Loofah should care.","url":"https://insights.sbomify.com/CVE-2026-126205/"}