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 3 Nov 2026 12:01:37 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

euvd · EUVD-2026-42300

Published

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, causing O(n^2) CPU consumption when yaml.load() parses a crafted ordered-map document. In v3 and v4, !!omap is active and exploitable by default. v5 doesn't use !!omap by default, and the chances of activating it are very low.This issue is fixed in 3.15.1, 4.3.1, and 5.2.1.

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.

Original publisher date fields

datePublished: Jul 8, 2026, 3:13:20 PM

dateUpdated: Oct 6, 2026, 3:07:05 PM

8 related source bulletins · separate from aliases

RHSA-2026:9455: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-2950 · CVE-2026-8723 · CVE-2026-45149 · CVE-2026-48615 · CVE-2026-48618 · CVE-2026-48619 · CVE-2026-48928 · CVE-2026-48930 · CVE-2026-48933 · CVE-2026-48934 · CVE-2026-48935 · CVE-2026-48936 · CVE-2026-59868 · CVE-2026-59870

RHSA-2026:34975: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-8286 · CVE-2026-8458 · CVE-2026-8924 · CVE-2026-8925 · CVE-2026-8926 · CVE-2026-8927 · CVE-2026-8932 · CVE-2026-9079 · CVE-2026-9080 · CVE-2026-9546 · CVE-2026-9547 · CVE-2026-11352 · CVE-2026-11564 · CVE-2026-11586 · CVE-2026-11856 · CVE-2026-12064 · CVE-2026-14683 · CVE-2026-14684 · CVE-2026-14685 · CVE-2026-14686 · CVE-2026-15187 · CVE-2026-38969 · CVE-2026-59868 · CVE-2026-59870

RHSA-2026:35272: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-13149 · CVE-2026-48619 · CVE-2026-48928 · CVE-2026-48930 · CVE-2026-48934 · CVE-2026-48935 · CVE-2026-48936 · CVE-2026-59868 · CVE-2026-59870

RHSA-2026:33866: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2026-13149 · CVE-2026-48619 · CVE-2026-48928 · CVE-2026-48930 · CVE-2026-48934 · CVE-2026-48935 · CVE-2026-48936 · CVE-2026-53550 · CVE-2026-59868 · CVE-2026-59870

RHSA-2026:7655: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-2950 · CVE-2026-45149 · CVE-2026-45736 · CVE-2026-59868 · CVE-2026-59870

RHSA-2026:34478: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2026-13149 · CVE-2026-48619 · CVE-2026-48928 · CVE-2026-48930 · CVE-2026-48934 · CVE-2026-48935 · CVE-2026-48936 · CVE-2026-59868 · CVE-2026-59870

RHSA-2026:26994: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-45491 · CVE-2026-45591 · CVE-2026-45736 · CVE-2026-59724 · CVE-2026-59868 · CVE-2026-59870

RHSA-2026:7378: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2025-55130 · CVE-2025-55131 · CVE-2025-55132 · CVE-2025-59464 · CVE-2026-2950 · CVE-2026-6734 · CVE-2026-9675 · CVE-2026-9678 · CVE-2026-9697 · CVE-2026-45149 · CVE-2026-48615 · CVE-2026-48618 · CVE-2026-48619 · CVE-2026-48928 · CVE-2026-48930 · CVE-2026-48933 · CVE-2026-48934 · CVE-2026-48935 · CVE-2026-48936 · CVE-2026-59868 · CVE-2026-59870

Source published: Jul 8, 2026, 3:13:20 PM (timezone not stated)
Source modified: Oct 6, 2026, 3:07:05 PM (timezone not stated)
Observed here: 3 Nov 2026 12:01:37 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H