Server-Side Request Forgery (SSRF) in jackson-databind - CVE-2026-77310
Published: August 24, 2026
Vulnerability identifier: #VU144596
CSH Severity: Medium
CVSS v4: 6.9 [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]
CVE-ID: CVE-2026-77310
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to server-side request forgery (SSRF) in InetAddress deserialization in FromStringDeserializer.Std._deserialize() when parsing attacker-controlled input into an InetAddress-typed target. A remote attacker can supply a crafted hostname for deserialization to disclose sensitive information.
The issue causes eager forward DNS resolution during deserialization, enabling DNS-based out-of-band interaction and blind enumeration of whether internal hostnames resolve before application-level validation.
Affected software
jackson-databind
How to mitigate CVE-2026-77310
Install security update from vendor's website.
jackson-databind - addressed in versions 2.18.9, 2.21.1, 2.21.5, 3.1.5, 3.2.1