Incorrect authorization in jackson-databind - CVE-2026-59889
Published: July 22, 2026
Vulnerability identifier: #VU139151
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-59889
CWE-ID: CWE-863
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 user to escalate privileges.
The vulnerability exists due to improper access control in UnwrappedPropertyHandler.processUnwrapped() when deserializing @JsonUnwrapped container properties under a less-privileged active view. A remote user can supply crafted JSON values for a property annotated with both @JsonView and @JsonUnwrapped to escalate privileges.
This affects the write-side authorization behavior of @JsonView during deserialization, including merge and builder-based deserialization paths.
How to mitigate CVE-2026-59889
Install security update from vendor's website.