{"schema_version":"2","view":"grouped","data":[{"id":3335,"cve_ids":["CVE-2026-84375"],"payload":{"kind":"advisory","title":"js-yaml: maxTotalMergeKeys does not limit CPU use for empty merge sources","summary":"js-yaml is a JavaScript YAML parser and dumper. From 3.0.0 until 3.15.2, 4.3.2, and 5.4.1, maxTotalMergeKeys in lib/js-yaml/loader.js and lib/loader.js does not count empty mapping sources while processing the merge key <<. An attacker can alias a large sequence of empty mappings into many merge targets, causing O(N * K) processing while totalMergeKeys remains unchanged and the configured resource limit is never reached. A relatively small YAML document can therefore cause prolonged CPU consumption in applications that parse untrusted YAML, and merge processing is enabled by default on these release lines. In v3 & v4, merge is enabled by default so the severity score is higher. This issue is fixed in versions 3.15.2, 4.3.2, and 5.4.1.","evidence":"cve:CVE-2026-84375","products":[{"name":{"value":"js-yaml","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"high","structured":{"id":"CVE-2026-84375","aliases":["CVE-2026-84375"],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}}],"affected":[{"vendor":"nodeca","product":"js-yaml","versions":[{"status":"affected","version":">= 3.0.0, < 3.15.2"},{"status":"affected","version":">= 4.0.0, < 4.3.2"},{"status":"affected","version":">= 5.0.0, < 5.4.1"}]}],"modified":"2026-09-28T21:32:39.387Z","provider":"cve","references":["https://github.com/nodeca/js-yaml/security/advisories/GHSA-2883-xcg3-v3hh","https://github.com/nodeca/js-yaml/pull/797","https://github.com/nodeca/js-yaml/commit/3485bc06ff8a0251505f44a00414d90df2466639","https://github.com/nodeca/js-yaml/commit/6a8e05f9a485188ed730ac81e81ae221352ef480","https://github.com/nodeca/js-yaml/commit/d90b6612a5a84385bdcb556c44578eac76dc0f6b","https://github.com/nodeca/js-yaml/releases/tag/3.15.2","https://github.com/nodeca/js-yaml/releases/tag/4.3.2","https://github.com/nodeca/js-yaml/releases/tag/5.4.1"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-84375","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-02T13:43:50.850378Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-02T16:02:06.745Z"}}],"cna":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-28T21:32:39.387Z"}}},"related_cves":[{"value":"CVE-2026-84375","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"},"group_id":"advisory:86645cd8-f61b-4770-bb69-9e0abc712183","priority":{"reasons":["publisher_severity"],"severity":"high","linked_cves":[],"fix_available":false,"known_exploited":false,"publisher_severity":"high"},"revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-84375","advisory_id":"86645cd8-f61b-4770-bb69-9e0abc712183","event_types":["advisory"],"published_at":"2026-10-24T21:33:50.73814+00:00","technologies":["core-cve","js-yaml"],"context_update":false,"extraction_method":"structured","source_published_at":"2026-09-01T21:43:13.617+00:00","detail_url":"/advisories/advisory%3A86645cd8-f61b-4770-bb69-9e0abc712183","group":{"id":"advisory:86645cd8-f61b-4770-bb69-9e0abc712183","revision":1,"primary_event_id":3348,"change":"published","superseded_by":[],"changed":{"id":3348,"cve_ids":["CVE-2026-84375"],"payload":{"kind":"advisory","title":"js-yaml: maxTotalMergeKeys does not limit CPU use for empty merge sources","summary":"js-yaml is a JavaScript YAML parser and dumper. From 3.0.0 until 3.15.2, 4.3.2, and 5.4.1, maxTotalMergeKeys in lib/js-yaml/loader.js and lib/loader.js does not count empty mapping sources while processing the merge key <<. An attacker can alias a large sequence of empty mappings into many merge targets, causing O(N * K) processing while totalMergeKeys remains unchanged and the configured resource limit is never reached. A relatively small YAML document can therefore cause prolonged CPU consumption in applications that parse untrusted YAML, and merge processing is enabled by default on these release lines. In v3 & v4, merge is enabled by default so the severity score is higher. This issue is fixed in versions 3.15.2, 4.3.2, and 5.4.1.","evidence":"cve:CVE-2026-84375","products":[{"name":{"value":"js-yaml","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"high","structured":{"id":"CVE-2026-84375","aliases":["CVE-2026-84375"],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}}],"affected":[{"vendor":"nodeca","product":"js-yaml","versions":[{"status":"affected","version":">= 3.0.0, < 3.15.2"},{"status":"affected","version":">= 4.0.0, < 4.3.2"},{"status":"affected","version":">= 5.0.0, < 5.4.1"}]}],"modified":"2026-09-28T21:32:39.387Z","provider":"cve","references":["https://github.com/nodeca/js-yaml/security/advisories/GHSA-2883-xcg3-v3hh","https://github.com/nodeca/js-yaml/pull/797","https://github.com/nodeca/js-yaml/commit/3485bc06ff8a0251505f44a00414d90df2466639","https://github.com/nodeca/js-yaml/commit/6a8e05f9a485188ed730ac81e81ae221352ef480","https://github.com/nodeca/js-yaml/commit/d90b6612a5a84385bdcb556c44578eac76dc0f6b","https://github.com/nodeca/js-yaml/releases/tag/3.15.2","https://github.com/nodeca/js-yaml/releases/tag/4.3.2","https://github.com/nodeca/js-yaml/releases/tag/5.4.1"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-84375","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-02T13:43:50.850378Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-02T16:02:06.745Z"}}],"cna":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-28T21:32:39.387Z"}}},"related_cves":[{"value":"CVE-2026-84375","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"},"group_id":"advisory:86645cd8-f61b-4770-bb69-9e0abc712183","priority":{"reasons":["publisher_severity"],"severity":"high","linked_cves":[],"fix_available":false,"known_exploited":false,"publisher_severity":"high"},"revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-84375","advisory_id":"86645cd8-f61b-4770-bb69-9e0abc712183","event_types":["advisory"],"published_at":"2026-10-24T21:33:50.73814+00:00","technologies":["core-cve","js-yaml"],"context_update":false,"extraction_method":"structured","source_published_at":"2026-09-01T21:43:13.617+00:00","detail_url":"/events/3348"},"members":[{"id":3348,"cve_ids":["CVE-2026-84375"],"payload":{"kind":"advisory","title":"js-yaml: maxTotalMergeKeys does not limit CPU use for empty merge sources","summary":"js-yaml is a JavaScript YAML parser and dumper. From 3.0.0 until 3.15.2, 4.3.2, and 5.4.1, maxTotalMergeKeys in lib/js-yaml/loader.js and lib/loader.js does not count empty mapping sources while processing the merge key <<. An attacker can alias a large sequence of empty mappings into many merge targets, causing O(N * K) processing while totalMergeKeys remains unchanged and the configured resource limit is never reached. A relatively small YAML document can therefore cause prolonged CPU consumption in applications that parse untrusted YAML, and merge processing is enabled by default on these release lines. In v3 & v4, merge is enabled by default so the severity score is higher. This issue is fixed in versions 3.15.2, 4.3.2, and 5.4.1.","evidence":"cve:CVE-2026-84375","products":[{"name":{"value":"js-yaml","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"high","structured":{"id":"CVE-2026-84375","aliases":["CVE-2026-84375"],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}}],"affected":[{"vendor":"nodeca","product":"js-yaml","versions":[{"status":"affected","version":">= 3.0.0, < 3.15.2"},{"status":"affected","version":">= 4.0.0, < 4.3.2"},{"status":"affected","version":">= 5.0.0, < 5.4.1"}]}],"modified":"2026-09-28T21:32:39.387Z","provider":"cve","references":["https://github.com/nodeca/js-yaml/security/advisories/GHSA-2883-xcg3-v3hh","https://github.com/nodeca/js-yaml/pull/797","https://github.com/nodeca/js-yaml/commit/3485bc06ff8a0251505f44a00414d90df2466639","https://github.com/nodeca/js-yaml/commit/6a8e05f9a485188ed730ac81e81ae221352ef480","https://github.com/nodeca/js-yaml/commit/d90b6612a5a84385bdcb556c44578eac76dc0f6b","https://github.com/nodeca/js-yaml/releases/tag/3.15.2","https://github.com/nodeca/js-yaml/releases/tag/4.3.2","https://github.com/nodeca/js-yaml/releases/tag/5.4.1"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-84375","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-02T13:43:50.850378Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-02T16:02:06.745Z"}}],"cna":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-28T21:32:39.387Z"}}},"related_cves":[{"value":"CVE-2026-84375","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"},"group_id":"advisory:86645cd8-f61b-4770-bb69-9e0abc712183","priority":{"reasons":["publisher_severity"],"severity":"high","linked_cves":[],"fix_available":false,"known_exploited":false,"publisher_severity":"high"},"revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-84375","advisory_id":"86645cd8-f61b-4770-bb69-9e0abc712183","event_types":["advisory"],"published_at":"2026-10-24T21:33:50.73814+00:00","technologies":["core-cve","js-yaml"],"context_update":false,"extraction_method":"structured","source_published_at":"2026-09-01T21:43:13.617+00:00","detail_url":"/events/3348"}]}}],"next_after":3335,"next_before":3335}