Answer in brief
CVE-2026-54516 records a Medium severity (CVSS 5.3) vulnerability in jackson-databind's renamed @JsonIgnore'd setters can deserialize via private fields. The current sources do not mark it as known exploited. The current feed maps com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| com.fasterxml.jackson.core:jackson-databindmaven | >=2.21.0,<2.21.4 | 2.21.4 |
| com.fasterxml.jackson.core:jackson-databindmaven | >=3.0.0,<3.1.4 | 3.1.4 |
| com.fasterxml.jackson.core:jackson-databindmaven | >=2.21.0 <2.21.4 | 2.21.4 |
| com.fasterxml.jackson.core:jackson-databindmaven | >=3.0.0 <3.1.4 | 3.1.4 |
| tools.jackson.core:jackson-databindmaven | >=3.0.0,<3.1.4 | 3.1.4 |
| tools.jackson.core:jackson-databindmaven | >=3.0.0 <3.1.4 | 3.1.4 |
Published upstream
Jun 23, 2026
Evidence: source:nvd:source_dates:source-dates:recordSource modified
Oct 25, 2026
Evidence: source:nvd:source_dates:source-dates:recordFirst seen by HOL
Jun 23, 2026
## Summary `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. ## Impact POJOs combining a renamed getter with an ignored setter (a read-only-over-the-wire pattern) have that field silently set from attacker input (property tampering / mass assignment). Not a general gadget; no RCE. ## Affected / Patched (verified via `git tag --contains`) - 2.21 line: `>= 2.21.0, < 2.21.4` -> fixed in **2.21.4** (backport `c3d56dd`, #5968) - 3.x line: `>= 3.0.0, < 3.1.4` -> fixed in **3.1.4** (#5967, `e88cb17`) ## Severity / CWE Maintainer: minor. Reporter: HIGH. CWE-915. ## Credits Omkhar Arasaratnam (@omkhar) - finder.
Quoted source text, attributed separately from HOL analysis.