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Medium severity · published Jun 23, 2026
CVE-2026-54518
jackson-databind: @JsonView bypass for unwrapped creator parameters in jackson-databind
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JA
jackson-databind · FasterXML
>= 2.21.0, < 2.21.4; >= 3.0.0, < 3.1.4 · source: vendor, NVD
Affected product
JA
jackson-databind
FasterXML
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54518
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54518
Patch
https://github.com/FasterXML/jackson-databind/commit/721fa07ebbd4aab4a659a1a68940878315c3e341
Patch
https://github.com/FasterXML/jackson-databind/commit/d633bc038f200c1397c07f1a2b46f58e72c91eea
Issue Tracking
https://github.com/FasterXML/jackson-databind/pull/5971
Issue Tracking
https://github.com/FasterXML/jackson-databind/pull/5973
Vendor Advisory
https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rcqc-6cw3-h962
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