Resource exhaustion in jackson-core - CVE-2026-68498

Vulnerability identifier: #VU149500

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2026-68498

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in ReaderBasedJsonParser when parsing an oversized JSON object property name from String, Reader, or char[] input. A remote attacker can submit a crafted JSON document containing a sufficiently long property name to cause a denial of service.

Byte-input and non-blocking parsers are not affected.

jackson-core
Fedora
jackson-parent
jackson-annotations
jackson-bom
jackson-core
jackson-databind
jackson-jaxrs-providers
jackson-modules-base
fasterxml-oss-parent

Install security update from vendor's website.

jackson-core - addressed in versions 2.18.10, 2.21.6, 2.22.2, 3.1.6, 3.2.2
jackson-parent - update to 2.18.4-1.fc44
jackson-annotations - update to 2.18.12-1.fc44
jackson-bom - update to 2.18.12-1.fc44
jackson-core - update to 2.18.12-1.fc44
jackson-databind - update to 2.18.12-1.fc44
jackson-jaxrs-providers - update to 2.18.12-1.fc44
jackson-modules-base - update to 2.18.12-1.fc44
fasterxml-oss-parent - update to 69-1.fc44

• https://github.com/FasterXML/jackson-core/security/advisories/GHSA-649p-m576-vr99

• Resource exhaustion in jackson-core
• Fedora 44 update for fasterxml-oss-parent, jackson-annotations, jackson-bom, jackson-core, jackson-databind, jackson-jaxrs-providers, jackson-modules-base, jackson-parent