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Advisory record · GHSA-m8xf-2cr7-77ph

PolymorphicTypeValidator bypass via generic type arguments and array element types in jackson-databind allows arbitrary class instantiation (incomplete fix for CVE-2026-54512) [CVE-2026-110879]

CVSS 9.8 CriticalCriticalEPSS 0.012 · 68th percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the maintainers · not yet reviewed by GitHub. The FasterXML/jackson-databind maintainers published this as a GitHub repository advisory; GitHub’s reviewed advisory replaces it here when it arrives.

Published by the FasterXML/jackson-databind maintainers at 20 Oct 2026, 22:44 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
com.fasterxml.jackson.core:jackson-databindMaven>=2.10.0, <=2.18.11 || >=2.19.0, <=2.21.7 || >=2.22.0, <=2.22.3No fixed version yet
tools.jackson.core:jackson-databindMaven>=3.0.0, <=3.1.7 || >=3.2.0, <=3.2.3No fixed version yet
Identifiers
GHSA-m8xf-2cr7-77ph · CVE-2026-110879
Weakness (CWE)
CWE-502
Tags
Published
20 Oct 2026
Updated
20 Oct 2026

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CNA (HeroDevs)
  • CISA KEV Not listed.
  • EPSS 0.012, the 68th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 20 Oct 2026, 22:44 UTC Published by the maintainers as a GitHub repository advisory
  2. 28 Oct 2026, 00:07 UTC Confirmed by the CVE List
  3. 28 Oct 2026, 01:16 UTC Confirmed by NVD

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.