{"answers":{"affected":"4 open source packages ship an affected version, including markdown-it.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111759 exists.","fix":"Upgrade markdown-it to a fixed version for your release line: 14.3.2 or 15.0.2.","what":"CVE-2026-111759 is a high-severity denial of service vulnerability in markdown-it, published on 19 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-2026-111759 and fix it if it is affected.\n\nWhat it is: CVE-2026-111759 is a high-severity denial of service vulnerability in markdown-it, published on 19 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-2026-111759 exists.\n\nAffected packages and fixed versions:\n- markdown-it (npm): affected all versions; fixed in 14.3.2\n- markdown-it (npm): affected all versions; fixed in 14.3.2\n- markdown-it (npm): affected from 15.0.0; fixed in 15.0.2\n- markdown-it (npm): affected from 15.0.0; fixed in 15.0.2\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-2026-111759/ (Markdown: https://insights.sbomify.com/CVE-2026-111759/index.md)","id":"CVE-2026-111759","markdown":"https://insights.sbomify.com/CVE-2026-111759/index.md","name":"CVE-2026-111759","record":{"aliases":["CLSA-2026-1792518269","CLSA-2026-1792523617","CLSA-2026-1792575285","CLSA-2026-1792587416","CLSA-2026-1792596594","CLSA-2026-1793102413","DEBIAN-CVE-2026-111759","ECHO-f728-a8df-aba7","GHSA-r7fv-28h4-cvq7","ROOT-APP-NPM-CVE-2026-111759","UBUNTU-CVE-2026-111759"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Markdown parser library","requires_auth":"none","summary":"Attackers can cause denial of service in applications using markdown-it with typographer enabled by submitting crafted Markdown input.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-407","name":"Inefficient Algorithmic Complexity"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"markdown-it is a Markdown parser. Prior to 14.3.2 and 15.0.2, when typographer: true is enabled, specially crafted Markdown can cause quadratic processing time in the smartquotes rule, potentially leading to denial of service in applications processing untrusted input. Many opening double quotes followed by unmatched closing single quotes cause repeated scans of the entire opener stack. The same issue occurs with the quote types reversed. The default configuration (typographer: false) is not affected, but this option is enabled with high probability. This issue is fixed in versions 14.3.2 and 15.0.2.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"markdown-it: Quadratic complexity in smartquotes with unmatched closing quotes","id":"CVE-2026-111759","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":4,"n_references":6,"next":{"headline":"A2A Java SDK has Server-Side Request Forgery (SSRF) in push-notification delivery","id":"CVE-2026-111761"},"packages":[{"ecosystem":"npm","fixed":["14.3.2"],"introduced":["0"],"last_affected":[],"package":"markdown-it","purl":null,"source":"GHSA-r7fv-28h4-cvq7"},{"ecosystem":"npm","fixed":["14.3.2"],"introduced":["0"],"last_affected":[],"package":"markdown-it","purl":"pkg:npm/markdown-it","source":"GHSA-r7fv-28h4-cvq7"},{"ecosystem":"npm","fixed":["15.0.2"],"introduced":["15.0.0"],"last_affected":[],"package":"markdown-it","purl":null,"source":"GHSA-r7fv-28h4-cvq7"},{"ecosystem":"npm","fixed":["15.0.2"],"introduced":["15.0.0"],"last_affected":[],"package":"markdown-it","purl":"pkg:npm/markdown-it","source":"GHSA-r7fv-28h4-cvq7"}],"prev":{"headline":"markdown-it: Quadratic-time rendering of a single multi-line link reference definition with default options (regression since 14.0)","id":"CVE-2026-111758"},"products":["markdown-it"],"published":"2026-10-19","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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["markdown-it"]},"summary":"Attackers can cause denial of service in applications using markdown-it with typographer enabled by submitting crafted Markdown input.","url":"https://insights.sbomify.com/CVE-2026-111759/"}