EUVD-2026-42300Published
js-yaml is a JavaScript YAML parser and dumper. Prior to 3.15.1, 4.3.1, and 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, causin…
Exact source revision recorded 1 Nov 2026 11:24:40 UTC. It does not establish the source's current position. Latest evidence.
Explicit identifiers and source references
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CVE-2026-59870 · Microsoft / collected KEV context
euvd · EUVD-2026-42300
- https://github.com/nodeca/js-yaml/security/advisories/GHSA-724g-mxrg-4qvm
- https://github.com/nodeca/js-yaml/commit/22a8071ef032117bc6249c330b240ac3aa2d3ded
- https://github.com/nodeca/js-yaml/commit/39f3211a2f01b3c6982710cf21434ab7060acefe
- https://github.com/nodeca/js-yaml/commit/c3cc4b0bb9ddb9af2dd9b61e0d56f5ce7983cd4a
- https://github.com/nodeca/js-yaml/releases/tag/3.15.1
- https://github.com/nodeca/js-yaml/releases/tag/4.3.1
- https://github.com/nodeca/js-yaml/releases/tag/5.2.1
Current operational correlations are not mixed into this historical source record. Open latest evidence to discover current connections.