{"id":"EUVD-2026-54244","revision":"b9b0e5729be647acb71fb5c337a7cfcd","records":[{"revision":"b9b0e5729be647acb71fb5c337a7cfcd","observedAt":"2026-11-01T11:59:11.787+00:00","statement":{"source":"euvd","id":"EUVD-2026-54244","aliases":["CVE-2026-71438","GHSA-c4c3-pg64-4m4v"],"title":"Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid's configuration setters (mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig)…","description":"Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid's configuration setters (mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig) merge caller-supplied configuration into Mermaid's internal config using the assignWithDepth deep-merge helper, which is vulnerable to prototype pollution. This is only exploitable if an application forwards untrusted data directly into one of these configuration entry points, which is outside their documented usage; diagram-supplied configuration (e.g. %%{init: {}}%% or YAML frontmatter) is not affected. This issue is fixed in versions 10.9.8 and 11.16.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:N/VI:L/VA:L/SC:H/SI:H/SA:H","score":2.4,"severity":null}],"references":["https://github.com/mermaid-js/mermaid/security/advisories/GHSA-c4c3-pg64-4m4v","https://github.com/mermaid-js/mermaid/pull/8022","https://github.com/mermaid-js/mermaid/commit/2cd6dcf735533b323507e3e889ffdea870540b43","https://github.com/mermaid-js/mermaid/commit/c34b07a0815842327e70794d69b0c8c5a1e2a956","https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1","https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-54244","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Aug 6, 2026, 7:59:07 PM","dateUpdated":"Aug 7, 2026, 3:40:29 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-54244","identifiers":["EUVD-2026-54244","CVE-2026-71438","GHSA-c4c3-pg64-4m4v"]},"retained":false,"historicalAffected":[]}],"coverage":[]}