Loading vulnerability…
CVE-2026-54516 is a property-binding vulnerability in Jackson-databind that permits deserialization into a private backing field despite an @JsonIgnore annotation on its setter. When the corresponding getter is renamed using @JsonProperty, POJOPropertiesCollector._renameProperties() renames the property rather than dropping it. With MapperFeature.INFER_PROPERTY_MUTATORS enabled, as it is by default, the backing field remains available. BeanDeserializerFactory.addBeanProps() then detects hasField()==true and constructs a writable FieldProperty. Attacker-controlled JSON using the renamed property can consequently modify the field directly. The affected 2.21 release range begins at 2.21.0; fixes are available in 2.21.4 and 3.1.4.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
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.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Jackson jackson-databind deserialization flaw allows attacker-supplied JSON to modify a private backing field despite @JsonIgnore on its setter. It occurs when the getter has @JsonProperty("renamed") and INFER_PROPERTY_MUTATORS is enabled, as it is by default. The plugin rates the vulnerability Medium, with CVSS v3 5.3, reflecting an unauthenticated network-accessible integrity impact. Updates are available in versions 2.21.4 and 3.1.4.
Unknown
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.