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Inefficient Regular Expression Complexity The advisory has been revoked - it doesn't affect any version of package rust  (opens in a new tab)

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EPSS
0.42% (34th percentile)

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  • Snyk IDSNYK-RHEL10-RUST-17610467
  • published4 Jul 2026
  • disclosed22 Jun 2026
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Introduced: 22 Jun 2026

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

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rust package and not the rust package as distributed by RHEL.

js-yaml is a JavaScript YAML parser and dumper. Prior to 4.2.0 and 3.15.0, 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 and 3.15.0.