Improperly Controlled Modification of Dynamically-Determined Object Attributes in jackson-databind - CVE-2026-54515
Published: July 22, 2026
Vulnerability identifier: #VU139156
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-54515
CWE-ID: CWE-915
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FasterXML
Affected software:
jackson-databind
jackson-databind
Detailed vulnerability description
The vulnerability allows a remote attacker to modify otherwise ignored object attributes.
The vulnerability exists due to improper control of dynamically determined object attributes in BeanDeserializerBase.createContextual() when processing case-insensitive deserialization with per-property @JsonIgnoreProperties exclusions. A remote attacker can send crafted JSON input to modify otherwise ignored object attributes.
Only applications that enable case-insensitive property matching and rely on per-property @JsonIgnoreProperties to keep a field unwritable are vulnerable.
How to mitigate CVE-2026-54515
Install security update from vendor's website.