Server-Side Request Forgery (SSRF) in jackson-databind - CVE-2026-54514
Published: July 22, 2026
Vulnerability identifier: #VU139157
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-54514
CWE-ID: CWE-918
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 cause outbound DNS requests and disclose limited network information.
The vulnerability exists due to server-side request forgery in JDKFromStringDeserializer when deserializing untrusted JSON into a type containing an InetSocketAddress field. A remote attacker can supply a crafted hostname value to cause outbound DNS requests and disclose limited network information.
The DNS lookup occurs during readValue before application-level validation or explicit connection logic.
How to mitigate CVE-2026-54514
Install security update from vendor's website.