Medium [CVE-2026-53550] Denial of Service via crafted YAML merge keys
This medium-severity Red Hat Linux advisory covers CVE-2026-53550.
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Summary
Denial of Service via crafted YAML merge keys. Red Hat rates this moderate (CVSS 5.3).
Weakness: CWE-1333. Red Hat lists fixing advisory RHSA-2026:33866 with package nodejs20-main-20.20.2-1.hum1, nodejs22-main-22.23.1-2.1.hum1, nodejs24-main-24.18.0-0.3.hum1, dotnet8-0-main-8.0.128-1.1.hum1.
- nodejs26-main-26.4.0-1.3.hum1
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- nodejs20-main-20.20.2-1.hum1
- nodejs22-main-22.23.1-2.1.hum1
- nodejs24-main-24.18.0-0.3.hum1
- dotnet8-0-main-8.0.128-1.1.hum1
- nodejs26-main-26.4.0-1.3.hum1
- nodejs25-main-25.9.0-1.3.hum1
- RHSA-2026:33866
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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