Resource exhaustion in jackson-core - CVE-2026-18401

Vulnerability identifier: #VU123309

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-2026-18401

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to the non-blocking (async) JSON parser in jackson-core bypasses the maxNumberLength constraint (default: 1000 characters) defined in StreamReadConstraints. A remote attacker can send JSON with arbitrarily long numbers through the async parser API and exhaust CPU resources, leading to a denial of service condition. 

jackson-core
IBM Virtualization Engine TS7700 3948-VED
System Storage Virtualization Engine TS7700 3948-VEF
Adobe Experience Manager
Virtualization Engine TS7700 3957-VED

Install updates from vendor's website.

jackson-core - addressed in versions 2.18.6, 2.21.1
Adobe Experience Manager - update to 6.5.25.0
Virtualization Engine TS7700 3957-VED - addressed in versions 8.60.0.115 VTD_EXEC.905, 8.60.0.116 VTD_EXEC.905
IBM Virtualization Engine TS7700 3948-VED - addressed in versions 8.60.0.115 VTD_EXEC.905, 8.60.0.116 VTD_EXEC.905, 8.61.0.60 VTD_EXEC.906
System Storage Virtualization Engine TS7700 3948-VEF - addressed in versions 8.60.0.115 VTD_EXEC.905, 8.60.0.116 VTD_EXEC.905, 8.61.0.60 VTD_EXEC.906

• https://github.com/FasterXML/jackson-core/security/advisories/GHSA-72hv-8253-57qq

• Denial of srevice in FasterXML jackson-core
• Multiple vulnerabilities in Adobe Experience Manager
• IBM System Storage Virtualization Engine TS7700 update for jackson-core