{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59870","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-07T15:41:53.607Z","datePublished":"2026-07-08T15:13:20.308Z","dateUpdated":"2026-07-08T15:50:55.378Z"},"containers":{"cna":{"title":"js-yaml quadratic-complexity denial of service via YAML11_SCHEMA !!omap parsing","problemTypes":[{"descriptions":[{"cweId":"CWE-407","lang":"en","description":"CWE-407: Inefficient Algorithmic Complexity","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/nodeca/js-yaml/security/advisories/GHSA-724g-mxrg-4qvm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nodeca/js-yaml/security/advisories/GHSA-724g-mxrg-4qvm"},{"name":"https://github.com/nodeca/js-yaml/commit/39f3211a2f01b3c6982710cf21434ab7060acefe","tags":["x_refsource_MISC"],"url":"https://github.com/nodeca/js-yaml/commit/39f3211a2f01b3c6982710cf21434ab7060acefe"},{"name":"https://github.com/nodeca/js-yaml/releases/tag/5.2.1","tags":["x_refsource_MISC"],"url":"https://github.com/nodeca/js-yaml/releases/tag/5.2.1"}],"affected":[{"vendor":"nodeca","product":"js-yaml","versions":[{"version":">= 5.0.0, < 5.2.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-08T15:13:20.308Z"},"descriptions":[{"lang":"en","value":"js-yaml is a JavaScript YAML parser and dumper. From 5.0.0 before 5.2.1, YAML11_SCHEMA support for the !!omap tag in src/tag/sequence/omap.ts uses omapTag.addItem() to perform a linear duplicate-key scan on every insertion, causing O(n^2) CPU consumption when yaml.load() parses a crafted ordered-map document. This issue is fixed in version 5.2.1."}],"source":{"advisory":"GHSA-724g-mxrg-4qvm","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/nodeca/js-yaml/security/advisories/GHSA-724g-mxrg-4qvm","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-08T15:50:31.265965Z","id":"CVE-2026-59870","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-08T15:50:55.378Z"}}]}}