How severe is CVE-2026-54517?

CVE-2026-54517 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-54517 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-54517?

CVE-2026-54517 affects Fasterxml Jackson-databind. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-54517?

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

Does CVE-2026-54517 have an EU (EUVD) identifier?

Yes. CVE-2026-54517 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38589.

When was CVE-2026-54517 published?

CVE-2026-54517 was published on 2026-06-23 and last updated on 2026-06-27.

CVE-2026-54517

CVE-2026-54517 is a medium-severity vulnerability in Fasterxml Jackson-databind with a CVSS 3.x base score of 5.3. 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 5.3)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38589
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, in BeanDeserializer._deserializeUsingPropertyBased, the active-view (@JsonView) filter was applied only to creator properties; the regular property-buffering branch performed no prop.visibleInView(activeView) check. A change making SetterlessProperty.isMerging() return true routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted @JsonView is populated from attacker JSON even when the active view excludes it. This vulnerability is fixed in 2.21.4 and 3.1.4.

Frequently asked questions

What is CVE-2026-54517?: 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, in BeanDeserializer._deserializeUsingPropertyBased, the active-view (@JsonView) filter was applied only to creator properties; the regular property-buffering branch performed no prop.visibleInView(activeView) check. A change making SetterlessProperty.isMerging() return true routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted @JsonView is populated from attacker JSON even when the active view excludes it. This vulnerability is fixed in 2.21.4 and 3.1.4.
How severe is CVE-2026-54517?: CVE-2026-54517 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-54517 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-54517?: CVE-2026-54517 affects Fasterxml Jackson-databind. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-54517?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-54517 have an EU (EUVD) identifier?: Yes. CVE-2026-54517 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38589.
When was CVE-2026-54517 published?: CVE-2026-54517 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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