Jackson Databind View Bypass in Unwrapped Creator 2.21.0-2.21.4,3.1.0-3.1.4
CVE-2026-54518 Published on June 23, 2026
jackson-databind: @JsonView bypass for unwrapped creator parameters in jackson-databind
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, UnwrappedPropertyHandler.processUnwrappedCreatorProperties() replays buffered JSON into creator parameters but never consults prop.visibleInView(activeView). The normal property-based creator path gates creator properties on the active view, but this unwrapped-creator replay path bypasses that check, so a constructor parameter annotated with both @JsonView(AdminView.class) and @JsonUnwrapped is populated from attacker JSON even when a more restrictive view is active. This vulnerability is fixed in 2.21.4 and 3.1.4.
Vulnerability Analysis
CVE-2026-54518 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-54518 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-54518
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Affected Versions
FasterXML jackson-databind:- Version >= 2.21.0, < 2.21.4 is affected.
- Version >= 3.0.0, < 3.1.4 is affected.