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CVE-2026-54513 is a polymorphic deserialization allowlist bypass in Jackson Databind, introduced in version 2.10.0. BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() accepts any array type based solely on clazz.isArray(), without checking whether its component type is allowlisted. Consequently, a validator combining this rule with an explicit concrete-type allowlist can still accept arrays of prohibited types. When array elements lack per-element type IDs, Jackson directly instantiates the component type without another PolymorphicTypeValidator check. This can enable unsafe object instantiation and arbitrary code execution in susceptible applications. Fixed releases are 2.18.8, 2.21.4, and 3.1.4.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
42 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Jackson-databind security-bypass vulnerability that allows arbitrary code execution, affecting installed packages on Rocky Linux 9 hosts covered by CIQ advisory crlsa-2026_40895.
An unspecified vulnerability covered by an Alma Linux 9.2 security check. The content assigns it a CVSS v3.0 vector of AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Jackson Databind security-bypass vulnerability that allows arbitrary code execution.
Jackson Databind security-bypass vulnerability that permits arbitrary code execution.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.