High8.8Red Hat & Ubuntu Linux
YAML safe_load production fallback to unsafe_load enables RCE via deserialization
CVE-2026-52903 Published Jun 9, 2026
CVE-2026-52903
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
YAML safe_load production fallback to unsafe_load enables RCE via deserialization. Red Hat rates this important (CVSS 8.8). Weakness: CWE-502. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released.
Mitigation checklist
Recommended fix / mitigation
- Red Hat rates this important; a fix erratum may not be out yet — apply the RHSA as soon as it publishes.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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