GHSA-9fxm-vc8v-hj55

Suggest an improvement
Source
https://github.com/advisories/GHSA-9fxm-vc8v-hj55
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9fxm-vc8v-hj55/GHSA-9fxm-vc8v-hj55.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-9fxm-vc8v-hj55
Aliases
  • CVE-2026-54516
Downstream
Related
Published
2026-06-23T21:24:26Z
Modified
2026-06-25T00:29:24.091837703Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
jackson-databind's renamed @JsonIgnore'd setters can deserialize via private fields
Details

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.

Database specific 
{
    "github_reviewed_at": "2026-06-23T21:24:26Z",
    "severity": "MODERATE",
    "cwe_ids": [
        "CWE-915"
    ],
    "github_reviewed": true,
    "nvd_published_at": null
}
References

Affected packages

Maven
com.fasterxml.jackson.core:jackson-databind

Package

Name
com.fasterxml.jackson.core:jackson-databind
View open source insights on deps.dev
Purl
pkg:maven/com.fasterxml.jackson.core/jackson-databind

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.21.0
Fixed
2.21.4

Affected versions

2.*
2.21.0
2.21.1
2.21.2
2.21.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9fxm-vc8v-hj55/GHSA-9fxm-vc8v-hj55.json"
com.fasterxml.jackson.core:jackson-databind

Package

Name
com.fasterxml.jackson.core:jackson-databind
View open source insights on deps.dev
Purl
pkg:maven/com.fasterxml.jackson.core/jackson-databind

Affected ranges

Type
ECOSYSTEM
Events
Introduced
3.0.0
Fixed
3.1.4

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9fxm-vc8v-hj55/GHSA-9fxm-vc8v-hj55.json"
tools.jackson.core:jackson-databind

Package

Name
tools.jackson.core:jackson-databind
View open source insights on deps.dev
Purl
pkg:maven/tools.jackson.core/jackson-databind

Affected ranges

Type
ECOSYSTEM
Events
Introduced
3.0.0
Fixed
3.1.4

Affected versions

3.*
3.0.0
3.0.1
3.0.2
3.0.3
3.0.4
3.1.0-rc1
3.1.0
3.1.1
3.1.2
3.1.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9fxm-vc8v-hj55/GHSA-9fxm-vc8v-hj55.json"