How severe is CVE-2026-54518?

CVE-2026-54518 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-54518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-54518?

CVE-2026-54518 affects Fasterxml Jackson-databind. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-54518?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-54518 have an EU (EUVD) identifier?

Yes. CVE-2026-54518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38629.

When was CVE-2026-54518 published?

CVE-2026-54518 was published on 2026-06-23 and last updated on 2026-06-27.

CVE-2026-54518

CVE-2026-54518 is a medium-severity vulnerability in Fasterxml Jackson-databind with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38629
Weakness: CWE-863
Affected product: Fasterxml Jackson-databind
Published: 2026-06-23
Last modified: 2026-06-27

Description

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 check, so a constructor parameter annotated with both @JsonView(AdminView.class) and @JsonUnwrapped is populated from attacker JSON even when a more restrictive view is active. This vulnerability is fixed in 2.21.4 and 3.1.4.

Frequently asked questions

What is CVE-2026-54518?: 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 check, so a constructor parameter annotated with both @JsonView(AdminView.class) and @JsonUnwrapped is populated from attacker JSON even when a more restrictive view is active. This vulnerability is fixed in 2.21.4 and 3.1.4.
How severe is CVE-2026-54518?: CVE-2026-54518 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-54518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-54518?: CVE-2026-54518 affects Fasterxml Jackson-databind. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-54518?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-54518 have an EU (EUVD) identifier?: Yes. CVE-2026-54518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38629.
When was CVE-2026-54518 published?: CVE-2026-54518 was published on 2026-06-23 and last updated on 2026-06-27.

References

Affected products (1)

cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:*

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