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Medium, CVSS 5.3amended

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

CVE-2026-77310GHSA-vvgp-rfg2-7rr6

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (tools.jackson.core:jackson-databind 3.2.1, 3.1.5; com.fasterxml.jackson.core:jackson-databind 2.22.1, 2.21.5, 2.18.9), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS
  • CVE-2026-77310: 0.31% estimated exploitation activity in the next 30 days; percentile 24.23 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary CVE-2026-54514 (GHSA-hgj6-7826-r7m5) fixed an eager-DNS-resolution / SSRF issue in jackson-databind's deserialization of java.net.InetSocketAddress by switching to InetSocketAddress.createUnresolved(...) (PR #5951, commit 1f5a1037, released in 2.18.8 / 2.21.4 / 3.1.4). That fix did not cover the sibling java.net.InetAddress branch in the very same FromStringDeserializer.Std.deserialize() switch statement, which still calls InetAddress.getByName(value) and therefore performs an eager forward DNS lookup on attacker-controlled input at deserialization time. The fix is incomplete: the same vulnerability class remains reachable through InetAddress. Details File: src/main/java/com/fasterxml/jackson/databind/deser/std/FromStringDeserializer.java Sibling cases in the same switch: - Line 357-358 (UNFIXED): case STDINETADDRESS: return InetAddress.getByName(value); // eager forward DNS lookup - Line 359-381 + helper at 494-496 (FIXED by PR #5951): protected InetSocketAddress…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-vvgp-rfg2-7rr6

  2. Revision 1 · created ·

    Published from osv record GHSA-vvgp-rfg2-7rr6

Agent brief

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# Patch Next advisory brief: CVE-2026-77310

Advisory: jackson-databind: Incomplete fix for CVE-2026-54514: eager DNS resolution (SSRF) still present in InetAddress deserialization
IDs: CVE-2026-77310, GHSA-vvgp-rfg2-7rr6
Record: https://patchnext.com/advisories/cve-2026-77310 (revision 2, source checked 26 Oct 2026, 16:56 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: tools.jackson.core:jackson-databind 3.2.1, 3.1.5; com.fasterxml.jackson.core:jackson-databind 2.22.1, 2.21.5, 2.18.9. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven tools.jackson.core:jackson-databind: affected >= 3.0.0, < 3.1.5; >= 3.2.0, < 3.2.1; fixed in 3.2.1, 3.1.5
- Maven com.fasterxml.jackson.core:jackson-databind: affected >= 2.0.0, < 2.18.9; >= 2.19.0, < 2.21.5; >= 2.22.0, < 2.22.1; fixed in 2.22.1, 2.21.5, 2.18.9

## Suggested inspection (read-only)
- Maven tools.jackson.core:jackson-databind: check the installed version with your package manager.
- Maven com.fasterxml.jackson.core:jackson-databind: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on tools.jackson.core:jackson-databind, com.fasterxml.jackson.core:jackson-databind.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-vvgp-rfg2-7rr6 (OSV record GHSA-vvgp-rfg2-7rr6 lists affected ranges: Maven com.fasterxml.jackson.core:jackson-databind >=2.0.0 =2.19.0 =2.22.0 =3.0.0 =3.2.0 <3.2.1 (fixed))
- Verified: https://github.com/advisories/GHSA-vvgp-rfg2-7rr6 (GitHub-reviewed advisory GHSA-vvgp-rfg2-7rr6 lists affected ranges: Maven com.fasterxml.jackson.core:jackson-databind >=2.0.0 =2.19.0 =2.22.0 =3.0.0 =3.2.0 <3.2.1)

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