CVE-2026-59869
HIGH
7.5
CVSS 3.1
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.
Metadata
Severity & Metrics
7.5
HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| nodeca | js-yaml | — | >= 3.0.0, < 3.15.0, >= 4.0.0, < 4.3.0 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-407 | cna | CWE-407: Inefficient Algorithmic Complexity |
CVSS scores (1)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 7.5 | HIGH | 3.1 | cna | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (5)
- https://github.com/nodeca/js-yaml/security/advisories/GHSA-52cp-r559-cp3m https://github.com/nodeca/js-yaml/security/advisories/GHSA-52cp-r559-cp3m
- https://github.com/nodeca/js-yaml/commit/24f13e79ee1343a7e30bd6f6c9d9cdbf0ac9b2b7 https://github.com/nodeca/js-yaml/commit/24f13e79ee1343a7e30bd6f6c9d9cdbf0ac9b2b7
- https://github.com/nodeca/js-yaml/commit/59423c6f8cdc78742ac00e25a4dd39ef16b702e4 https://github.com/nodeca/js-yaml/commit/59423c6f8cdc78742ac00e25a4dd39ef16b702e4
- https://github.com/nodeca/js-yaml/releases/tag/3.15.0 https://github.com/nodeca/js-yaml/releases/tag/3.15.0
- https://github.com/nodeca/js-yaml/releases/tag/4.3.0 https://github.com/nodeca/js-yaml/releases/tag/4.3.0