Medium [CVE-2026-77310] com.fasterxml.jackson.core/jackson-databind: jackson-databind: Server-Side Request Forgery and internal host enumeration via eager DNS resolution
This medium-severity Red Hat Linux advisory covers CVE-2026-77310 affecting Exploit Intelligence, OpenShift Developer Tools and Services, OpenShift Serverless.
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Summary
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. A remote attacker can exploit this vulnerability by providing specially crafted input during data deserialization, specifically when `java.net.
InetAddress` objects are processed. This allows for out-of-band data exfiltration or the enumeration of internal network hosts.
Moderate impact. Red Hat products utilizing `jackson-databind` are susceptible to server-side request forgery (SSRF) and internal host enumeration.
This occurs when attacker-controlled input, containing hostnames or IP addresses, is deserialized, leading to eager DNS resolution and potential information disclosure or internal network probing. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
Weakness: CWE-918.
- < 2.18.9
- < 2.21.5
- < 2.22.1
- < 3.1.5
- < 3.2.1
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 2.18.9
- 2.21.5
- 2.22.1
- 3.1.5
- 3.2.1
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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