node-js-yaml: js-yaml is a JavaScript YAML parser and dumper
CVE-2025-64718 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2025-64718, released November 13, 2025. It is not reported as exploited. Patch Radar priority: Routine.
js-yaml is a JavaScript YAML parser and dumper. In js-yaml before 4.1.1 and 3.14.2, it's possible for an attacker to modify the prototype of the result of a parsed yaml document via prototype pollution (`__proto__`). All users who parse untrusted yaml documents may be impacted. The problem is patched in js-yaml 4.1.1 and 3.14.2. Users can protect against this kind of attack on the server by using `node --disable-proto=delete` or `deno` (in Deno, pollution protection is on by default).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| cockpit-repos · opensuse-leap 16.0 | 4.7-160000.1.1 | OPENSUSE-SU-2026:20251-1 | Feb 18, 2026 |
| cockpit-repos · sles 16.0 | 4.7-160000.1.1 | SUSE-SU-2026:20580-1 | Feb 18, 2026 |
| cockpit-subscriptions · opensuse-leap 16.0 | 12.1-160000.1.1 | OPENSUSE-SU-2026:20117-1 | Jan 27, 2026 |
| cockpit-subscriptions · sles 16.0 | 12.1-160000.1.1 | SUSE-SU-2026:20182-1 | Jan 27, 2026 |
| node-js-yaml · Debian 14 | 4.1.1+dfsg+~4.0.9-1 | DEBIAN-CVE-2025-64718 | Nov 13, 2025 |
| yarnpkg · Fedora 43 | 1.22.22-18.fc43 | FEDORA-2026-085ABEEA02 | Apr 2, 2026 |
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