Privilege escalation via skipped unwrapped property view
Published Jul 14, 2026 · Updated Jul 14, 2026
Incorrect authorization in FasterXML jackson-databind allows remote authenticated users to write state excluded from their active JSON view. UnwrappedPropertyHandler.processUnwrapped() replays buffered JSON and calls prop.deserializeAndSet() without testing prop.visibleInView() against the active view. A consuming application must bind attacker-controlled JSON under a restricted @JsonView while sensitive state resides in a field- or setter-backed @JsonUnwrapped container; exploitation changes that state without reading data or interrupting service.
Summary
What happened
Incorrect authorization in FasterXML jackson-databind allows remote authenticated users to write state excluded from their active JSON view. UnwrappedPropertyHandler.processUnwrapped() replays buffered JSON and calls prop.deserializeAndSet() without testing prop.visibleInView() against the active view. A consuming application must bind attacker-controlled JSON under a restricted @JsonView while sensitive state resides in a field- or setter-backed @JsonUnwrapped container; exploitation changes that state without reading data or interrupting service.
The record
- CVE
- CVE-2026-59889
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- FasterXML
- Product
- jackson-databind
- Classifications
- CWE-863, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 2.18.0, < 2.18.9
- Affected versionversion=>= 2.21.0, < 2.21.5
- Affected versionversion=>= 2.22.0, < 2.22.1
- Affected versionversion=>= 3.0.0, < 3.1.5
- Affected versionversion=>= 3.2.0, < 3.2.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Upstream mass-assignment proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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