Unsafe reflection in jackson-databind - #VU144593
Published: August 24, 2026
Vulnerability identifier: #VU144593
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-470
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use of externally controlled input to select classes or code in JDKFromStringDeserializer.NioPathHelper.deserialize when deserializing untrusted JSON into a java.nio.file.Path field. A remote attacker can supply a specially crafted URI scheme to drive FileSystemProvider resolution and cause a denial of service.
Exploitation occurs during readValue, and meaningful side effects beyond the reported availability impact depend on the presence of a side-effecting third-party FileSystemProvider on the classpath.
Affected software
jackson-databind
Remediation
Install security update from vendor's website.
jackson-databind - addressed in versions 2.18.10, 2.21.6, 2.22.2, 3.1.6, 3.2.2