High [CVE-2026-54513] Security bypass allows arbitrary code execution
This high-severity Red Hat Linux advisory covers CVE-2026-54513.
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Summary
Security bypass allows arbitrary code execution. Red Hat rates this important (CVSS 8.1).
Weakness: CWE-184. Red Hat lists fixing advisory RHSA-2026:36839 with package jackson-databind.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- jackson-databind
- RHSA-2026:36839
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Upgrade to version 2.18.8, 2.21.4, or 3.1.4 or later to address this vulnerability. If upgrading is not immediately possible, remove BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() from the application’s ObjectMapper configuration to eliminate the affected deserialization path. Rebuild and restart the application to apply the configuration change. As an additional mitigation, disable polymorphic deserialization of untrusted data where possible by avoiding or removing default typing features such as activateDefaultTyping() or enableDefaultTyping(). When polymorphic deserialization is required, restrict allowed subtypes using a strict whitelist of trusted application packages and avoid broad or permissive type validation rules.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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