CVE-2026-54518: jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Proce

Routine

MEDIUM 6.5REMOTEUPGRADE

CVE-2026-54518 is a medium-severity flaw (CVSS 6.5) 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 2.21.0 until 2.21.4 and 3.1.4, UnwrappedPropertyHandler.processUnwrappedCreatorProperties() replays buffered JSON into creator parameters but never consults prop.visibleInView(activeView). The normal property-based creator path gates creator properties on the active view, but this unwrapped-creator replay path bypasses that che

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-863
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 22:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

fasterxml jackson-databind UPGRADE

Affected: >= 2.21.0 and < 2.21.4 · >= 3.0.0 and < 3.1.4

Fixed in: 2.21.4, 3.1.4

Safe to downgrade to: a release before 2.21.0

1. Check installed version

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

2. UPGRADE to 2.21.4 (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 2.21.0 (Debian / Ubuntu)

apt-cache madison jackson-databind sudo apt install jackson-databind=<VERSION_BEFORE_2.21.0> 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_2.21.0> 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.

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-2026-54518?

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

Is CVE-2026-54518 being exploited?

CVE-2026-54518 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-2026-54518 affect?

CVE-2026-54518 affects jackson-databind. Severity is medium (CVSS 6.5). jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, UnwrappedPropertyHandler.processUnwrappedCreatorProperties() replays buffered JSON into

How urgent is CVE-2026-54518?

Priority 35/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-54512 HIGH 8.1 UPGRADE jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Proce
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-2026-54515 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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