| Name | CVE-2026-59869 |
| Description | js-yaml is a JavaScript YAML parser and dumper. From 3.0.0 before 3.15.0 and from 4.0.0 before 4.3.0, js-yaml can spend quadratic CPU time parsing a document whose size grows only linearly when a chain of mappings uses merge keys where each mapping merges the previous one. This issue is fixed in versions 3.15.0 and 4.3.0. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1141820 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| node-js-yaml (PTS) | bullseye | 3.14.1+dfsg+~3.12.6-2 | vulnerable |
| bookworm, trixie | 4.1.0+dfsg+~4.0.5-7 | vulnerable | |
| forky, sid | 4.2.0+~4.0.9-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| node-js-yaml | source | (unstable) | (unfixed) | 1141820 |
[trixie] - node-js-yaml <no-dsa> (Minor issue)
[bookworm] - node-js-yaml <postponed> (Minor issue)
[bullseye] - node-js-yaml <postponed> (Minor issue)
https://github.com/nodeca/js-yaml/security/advisories/GHSA-52cp-r559-cp3m
Fixed by: https://github.com/nodeca/js-yaml/commit/24f13e79ee1343a7e30bd6f6c9d9cdbf0ac9b2b7 (3.15.0)
Fixed by: https://github.com/nodeca/js-yaml/commit/59423c6f8cdc78742ac00e25a4dd39ef16b702e4 (4.3.0)