Buffer overflow in jackson-core - CVE-2026-29062

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Main Vulnerability Database Vulnerabilities #VU123491

Buffer overflow in jackson-core - CVE-2026-29062

Published: March 4, 2026


Vulnerability identifier: #VU123491
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-29062
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: FasterXML
Affected software:
jackson-core

Detailed vulnerability description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a boundary error in UTF8DataInputJsonParser when parsing deeply nested JSON files. A remote attacker can pass a specially JSON data to the application and perform a denial of service attack.

Note, the vulnerability exists due to the fix for #VU112106 (CVE-2025-52999) has not been properly applied for the 3.x branch. 


How to mitigate CVE-2026-29062

Install updates from vendor's website.

Sources