CVE-2026-54518: Jackson databind Jackson-databind Has A @JsonView Bypass Vulnerability
MODERATECVE-2026-54518 is a MODERATE (CVSS 6.5) jackson-databind has a @jsonview bypass vulnerability (CWE-863: Incorrect Authorization) affecting Jackson databind libraries in the Maven ecosystem. The issue involves jackson-databind has a @jsonview bypass for unwrapped creator parameters. Remediation is available by upgrading affected packages to version 2.21.4, 3.1.4.
CVE-2026-54518 at a Glance
Security Impact
CVSS: 6.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N).
How to Fix CVE-2026-54518
To remediate this vulnerability, upgrade all affected Jackson databind dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.21.4</version>
</dependency><dependency>
<groupId>tools.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>3.1.4</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=com.fasterxml.jackson.coreHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-54518, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=com.fasterxml.jackson.coreAnalyze the terminal output to locate any version of Jackson databind in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.21.4), your application is affected.
Note: The mvn dependency:tree -Dincludes=com.fasterxml.jackson.core command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In Jackson databind, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-54518 Affected Jackson databind Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
com.fasterxml.jackson.core:jackson-databind
|
Maven |
≥ 2.21.0
< 2.21.4
|
2.21.4
|
|
tools.jackson.core:jackson-databind
|
Maven |
≥ 3.0.0
< 3.1.4
|
3.1.4
|
References
Frequently Asked Questions
What is CVE-2026-54518?
Which Jackson databind versions are affected?
What version fixes CVE-2026-54518?
Is jackson-databind affected?
What is the CVSS score of CVE-2026-54518?
What CWE is associated with CVE-2026-54518?
How can I check Maven dependencies for CVE-2026-54518?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-rcqc-6cw3-h962",
"modified" : "2026-07-20T21:22:18Z",
"published" : "2026-06-23T21:17:02Z",
"aliases" : [ "CVE-2026-54518" ],
"summary" : "jackson-databind has a @JsonView bypass for unwrapped creator parameters",
"details" : "## Summary\n`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.\n\n## Impact\nView-restricted unwrapped creator parameters can be set from untrusted input where `@JsonView` is used as a write-side authorization boundary.\n\n## Affected / Patched (verified via `git tag --contains`)\n- 2.21 line: `>= 2.21.0, < 2.21.4` -> fixed in **2.21.4** (backport `721fa07`, #5973)\n- 3.x line: `>= 3.0.0, < 3.1.4` -> fixed in **3.1.4** (#5971, `d633bc0`)\n\n## Severity / CWE\nMaintainer: minor. Reporter: HIGH. CWE-863 (Incorrect Authorization); related CWE-284.\n\n## Credits\nOmkhar Arasaratnam (@omkhar) - finder.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "com.fasterxml.jackson.core:jackson-databind"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.21.0"
}, {
"fixed" : "2.21.4"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "tools.jackson.core:jackson-databind"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "3.0.0"
}, {
"fixed" : "3.1.4"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rcqc-6cw3-h962"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-54518"
}, {
"type" : "WEB",
"url" : "https://github.com/FasterXML/jackson-databind/pull/5971"
}, {
"type" : "WEB",
"url" : "https://github.com/FasterXML/jackson-databind/pull/5973"
}, {
"type" : "WEB",
"url" : "https://github.com/FasterXML/jackson-databind/commit/721fa07ebbd4aab4a659a1a68940878315c3e341"
}, {
"type" : "WEB",
"url" : "https://github.com/FasterXML/jackson-databind/commit/d633bc038f200c1397c07f1a2b46f58e72c91eea"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/FasterXML/jackson-databind"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-863" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-06-23T21:17:02Z",
"nvd_published_at" : "2026-06-23T22:16:32Z"
}
}