Medium [CVE-2026-54516] Security bypass due to improper handling of renamed properties
This medium-severity Red Hat Linux advisory covers CVE-2026-54516 affecting Red Hat build of Quarkus 3.27.4.SP2, Red Hat build of Quarkus 3.33.2.SP2, Cryostat 4.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
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, POJOPropertiesCollector._renameProperties() allows a property with @JsonProperty("renamed") on the getter and @JsonIgnore on the setter to be renamed rather than dropped.
With MapperFeature.INFER_PROPERTY_MUTATORS enabled (default), the private backing field is retained; during deserialization BeanDeserializerFactory.addBeanProps() sees hasField()==true, builds a FieldProperty, and makes the backing field writable.
An attacker supplying the renamed JSON key writes the backing field directly, bypassing the @JsonIgnore on the setter. This vulnerability is fixed in 3.1.4.
This vulnerability allows a remote attacker to bypass security controls by exploiting an issue in how properties are handled when both @JsonProperty (for renaming) and @JsonIgnore (for ignoring) annotations are used.
By supplying a specially crafted JSON key, an attacker can directly write to a private data field, circumventing the intended security restrictions and potentially leading to unexpected data modification. Moderate: This flaw in jackson-databind allows for property tampering and mass assignment in Red Hat products.
Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N). Weakness: CWE-915.
Is CVE-2026-54516 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-54516 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-54516?
Upgrade to a fixed release named by Red Hat:
- 3.1.4
- com.fasterxml.jackson.core/jackson-databind:2.21.4.redhat-00002
- RHSA-2026:36002
- RHSA-2026:36013
Confirm against the vendor advisory before you patch.
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 14 days ago·verify at source
- 3.1.4
- com.fasterxml.jackson.core/jackson-databind:2.21.4.redhat-00002
- RHSA-2026:36002
- RHSA-2026:36013
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
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