CVE-2026-59888Network attack vector

Unauthorized field modification via stale ignore name

Published Jul 14, 2026 · Updated Jul 14, 2026

Improper attribute control in FasterXML jackson-databind allows remote attackers to set ignored Java Record components via JSON. POJOPropertiesCollector stores an ignored component's implicit name before PropertyNamingStrategy renames it, so the renamed key escapes the ignore set and reaches the constructor. Exploitation requires an application to deserialize untrusted input into a Record combining a naming strategy with @JsonIgnore; only fields exposed through that pattern can be modified.

CVSS severity6.5
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper attribute control in FasterXML jackson-databind allows remote attackers to set ignored Java Record components via JSON. POJOPropertiesCollector stores an ignored component's implicit name before PropertyNamingStrategy renames it, so the renamed key escapes the ignore set and reaches the constructor. Exploitation requires an application to deserialize untrusted input into a Record combining a naming strategy with @JsonIgnore; only fields exposed through that pattern can be modified.

The record

CVE
CVE-2026-59888
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
FasterXML
Product
jackson-databind
Classifications
CWE-915
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=>= 2.15.0, < 2.18.8
  2. Affected versionversion=>= 2.19.0, < 2.21.4
  3. Affected versionversion=>= 3.0.0, < 3.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FasterXML · jackson-databindversion=>= 2.15.0, < 2.18.8; version=>= 2.19.0, < 2.21.4; version=>= 3.0.0, < 3.1.4

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-915Improperly Controlled Modification of Dynamically-Determined Object Attributes

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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