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CVE-2026-54515 is a property-exclusion bypass in Jackson Databind affecting vulnerable releases starting with 2.8.0. In BeanDeserializerBase.createContextual(), _handleByNameInclusion() applies per-property @JsonIgnoreProperties exclusions by removing properties from the contextual deserializer's BeanPropertyMap. When per-property @JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES) processing subsequently enables case-insensitive matching, it rebuilds the map from the original this._beanProperties rather than contextual._beanProperties. This overwrites the filtered map and restores excluded properties, making them writable during deserialization of untrusted JSON.
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31 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability referenced by a FreeBSD security check for the Keycloak package. The content does not provide vulnerability-specific technical details.
An unspecified vulnerability referenced by an Alma Linux 9.2 security check; no technical flaw details or severity are provided in the content.
Jackson Databind flaw permitting unexpected modification of ignored properties.
Jackson Databind flaw allowing properties intended to be ignored to be modified unexpectedly.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.