CVE-2026-54512: jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Proce

Q: How do I fix CVE-2026-54512?

jackson-databind: upgrade to 2.18.8, 2.21.4, 3.1.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-54512 being exploited?

CVE-2026-54512 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-54512 affect?

CVE-2026-54512 affects jackson-databind. Severity is high (CVSS 8.1). jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechani

Q: How urgent is CVE-2026-54512?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.1REMOTEUPGRADE

CVE-2026-54512 is a high-severity flaw (CVSS 8.1) affecting jackson-databind. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechanism guarding polymorphic deserialization. When polymorphic typing is enabled and a type identifier contains generic parameters (i.e. the type ID string contains <), DatabindContext._resolveAndValidateGeneric() v

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-184, CWE-502
Published	2026-06-23
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: fasterxml

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-23 21:17 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

fasterxml jackson-databind UPGRADE

Affected: >= 2.10.0 and < 2.18.8 · >= 2.19.0 and < 2.21.4 · >= 3.0.0 and < 3.1.4

Fixed in: 2.18.8, 2.21.4, 3.1.4

Safe to downgrade to: a release before 2.10.0

1. Check installed version

apt-cache policy jackson-databind || rpm -q jackson-databind || jackson-databind --version

2. UPGRADE to 2.18.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade jackson-databind

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jackson-databind

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.10.0 (Debian / Ubuntu)

apt-cache madison jackson-databind sudo apt install jackson-databind=<VERSION_BEFORE_2.10.0> sudo apt-mark hold jackson-databind

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list jackson-databind sudo dnf downgrade jackson-databind-<VERSION_BEFORE_2.10.0> sudo dnf versionlock add jackson-databind

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Maven · com.fasterxml.jackson.core:jackson-databind · FIXED · 2.18.8 · vulnerable: >= 2.10.0, <= 2.18.7 · source

Set com.fasterxml.jackson.core:jackson-databind to 2.18.8 or later in pom.xml or build.gradle, then rebuild and redeploy.

Maven · tools.jackson.core:jackson-databind · FIXED · 3.1.4 · vulnerable: >= 3.0.0, <= 3.1.3 · source

Set tools.jackson.core:jackson-databind to 3.1.4 or later in pom.xml or build.gradle, then rebuild and redeploy.

Fedora 46 · mingw-qt5-qtwebkit · FIXED · 5.212.0-0.46.alpha4.fc46 · FEDORA-2026-46ae541c22 · source

sudo dnf upgrade --advisory=FEDORA-2026-46ae541c22

Fedora ELN · kdominate · FIXED · 26.08.2-2.eln159 · FEDORA-2026-b1d98239fd · source

sudo dnf upgrade --advisory=FEDORA-2026-b1d98239fd

Ubuntu 22.04 · jackson-databind · NO FIX YET

Debian 12 · jackson-databind · NO FIX YET

Debian 13 · jackson-databind · NO FIX YET

RHEL 10 · dogtag-pki · FIXED · dogtag-pki-11.9.0-4.el10_2

sudo dnf upgrade --advisory=RHSA-2026:43400 rpm -q dogtag-pki

RHEL 10.0 Extended Update Support · dogtag-pki · FIXED · dogtag-pki-11.6.0-2.el10_0

sudo dnf upgrade --advisory=RHSA-2026:44271 rpm -q dogtag-pki

RHEL 9 · jackson-databind · FIXED · jackson-databind-2.21.4-1.el9_8

sudo dnf upgrade --advisory=RHSA-2026:40895 rpm -q jackson-databind

RHEL 9.2 Update Services for SAP Solutions · jackson-databind · FIXED · jackson-databind-2.21.4-1.el9_2

sudo dnf upgrade --advisory=RHSA-2026:44063 rpm -q jackson-databind

RHEL 9.4 Update Services for SAP Solutions · jackson-databind · FIXED · jackson-databind-2.21.4-1.el9_4

sudo dnf upgrade --advisory=RHSA-2026:44065 rpm -q jackson-databind

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-1947 · source

sudo dnf update --advisory=ALAS2023-2026-1947

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: avergnaud/flight-sql-jdbc-driver-cve-2026-54512 (0 stars)
GitHub PoC: cklinisme/doris-spark-connector-cve (0 stars)
Write-up: github.com/FasterXML/jackson-databind/security/advisories/GHSA-j3rv-43j4-c7qm

Advisories and coverage

Official advisories

AlmaLinux Errata: [ALSA-2026:40895] Important: jackson-annotations, jackson-core, jackson-databind, jackson-jaxrs-providers, and jackson-modules-base security 2026-07-17

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-54512?

jackson-databind: upgrade to 2.18.8, 2.21.4, 3.1.4. Exact commands for each OS are on this page.

Is CVE-2026-54512 being exploited?

CVE-2026-54512 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-54512 affect?

CVE-2026-54512 affects jackson-databind. Severity is high (CVSS 8.1). jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechani

How urgent is CVE-2026-54512?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-54513 HIGH 8.1 UPGRADE jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Proce
CVE-2026-50193 HIGH 7.5 UPGRADE jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Proce
CVE-2026-54518 MEDIUM 6.5 UPGRADE jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Proce
CVE-2026-54515 MEDIUM 5.3 UPGRADE jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Proce
CVE-2026-54516 MEDIUM 5.3 UPGRADE jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Proce

References

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