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CVE-2026-59307 is a Java deserialization vulnerability caused by a silently bypassed deserialization allow-list. The issue is described as arising when setBeanClassLoader replaces the deserializer while the mapper retains a stale reference, resulting in the expected allow-list enforcement not being applied to subsequent deserialization operations. In the affected message-processing path, an attacker able to supply arbitrary serialized bytes to the message content field can trigger unsafe Java deserialization and achieve remote code execution despite the system being configured under the assumption that only allow-listed classes would be accepted.
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What an attacker gets, and what they’ve been doing with it.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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3 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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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.