Inefficient Regular Expression Complexity Affecting nodejs26-bin package, versions <0:26.4.0-1.3.hum1


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.38% (31st percentile)

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  • Snyk IDSNYK-RHEL10-NODEJS26BIN-17814420
  • published4 Jul 2026
  • disclosed22 Jun 2026

Introduced: 22 Jun 2026

CVE-2026-53550  (opens in a new tab)
CWE-1333  (opens in a new tab)

How to fix?

Upgrade RHEL:10 nodejs26-bin to version 0:26.4.0-1.3.hum1 or higher.
This issue was patched in RHSA-2026:33866.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nodejs26-bin package and not the nodejs26-bin package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

js-yaml is a JavaScript YAML parser and dumper. Prior to 4.2.0, a crafted YAML document can trigger algorithmic CPU exhaustion in js-yaml merge-key processing (<<) by repeating the same alias many times in a merge sequence. This causes quadratic parse-time behavior relative to input size and can block a Node.js worker/event loop for seconds with a relatively small payload (tens of KB), resulting in denial of service. The issue is in merge handling inside lib/loader.js. This vulnerability is fixed in 4.2.0.

CVSS Base Scores

version 3.1