CVE-2026-77310: Fasterxml Com.fasterxml.jackson.core:jackson-Databind

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. Prior to versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1 on their respective release lines, the java.net.InetAddress branch of FromStringDeserializer.Std._deserialize() calls InetAddress.getByName() on attacker-controlled input, causing eager DNS resolution during deserialization and enabling DNS-based server-side request forgery and internal-host enumeration. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1.

Affected products

• Fasterxml Com.fasterxml.jackson.core:jackson-Databind: from 2.0.0, before 2.18.9 (fixed in 2.18.9); from 2.19.0, before 2.21.5 (fixed in 2.21.5); from 2.22.0, before 2.22.1 (fixed in 2.22.1)
• Fasterxml Tools.jackson.core:jackson-Databind: from 3.0.0, before 3.1.5 (fixed in 3.1.5); from 3.2.0, before 3.2.1 (fixed in 3.2.1)

Published 2026-08-24. Last modified 2026-09-09.