{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105219","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-10-04T13:04:00.479Z","datePublished":"2026-10-04T17:09:54.186Z","dateUpdated":"2026-10-04T17:09:54.186Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-10-04T17:09:54.186Z"},"datePublic":"2026-09-01T00:00:00.000Z","title":"Mammoth.js 1.3.0 before 1.12.3 ReDoS via Style Map Tokeniser","descriptions":[{"lang":"en","value":"Mammoth.js 1.3.0 before 1.12.3 contains a regular expression denial of service vulnerability in the style map tokeniser in lib/styles/parser/tokeniser.js due to overlapping regex alternatives. Attackers can supply a crafted .docx with an unterminated quoted string of repeated backslash escapes in mammoth/style-map to block the Node.js event loop."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Inefficient Regular Expression Complexity","cweId":"CWE-1333","type":"CWE"}]}],"affected":[{"vendor":"mwilliamson","product":"mammoth.js","defaultStatus":"unaffected","packageURL":"pkg:npm/mammoth","versions":[{"version":"1.3.0","lessThan":"1.12.3","status":"affected","versionType":"semver"}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/mwilliamson/mammoth.js/issues/487","tags":["issue-tracking"],"name":"GitHub Issue #487"},{"url":"https://github.com/mwilliamson/mammoth.js/commit/dc49225425c2c07de0a6dc3529f2386c82a032b4","tags":["patch"]},{"url":"https://github.com/mwilliamson/mammoth.js/blob/1.12.2/lib/styles/parser/tokeniser.js#L6-L30","tags":["technical-description"]},{"url":"https://github.com/mwilliamson/mammoth.js","tags":["product"]},{"name":"VulnCheck Advisory: Mammoth.js 1.3.0 before 1.12.3 ReDoS via Style Map Tokeniser","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/mammoth-js-1.3.0-before-1.12.3-redos-via-style-map-tokeniser"}],"credits":[{"lang":"en","value":"Siyang Wu","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}