Uncontrolled Recursion in protobufjs-cli and protobuf.js - CVE-2026-54269
Published: June 13, 2026
Vulnerability identifier: #VU134484
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-54269
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in protobufjs runtime helpers when processing schema-derived names that shadow runtime-significant properties. A remote attacker can provide a crafted protobuf schema or protobufjs JSON descriptor to cause a denial of service.
Exploitation requires the application to load or use a schema or descriptor containing a problematic name and to reach the affected API path.
Affected software
protobufjs-cli
protobuf.js
IBM Maximo Application Suite - Manage Component
IBM App Connect Enterprise
protobuf.js
IBM Maximo Application Suite - Manage Component
IBM App Connect Enterprise
How to mitigate CVE-2026-54269
Install security update from vendor's website.
protobufjs-cli - addressed in versions 1.3.3, 2.5.1
protobuf.js - addressed in versions 1.5.2, 3.0.0, 7.6.3, 8.6.0
IBM Maximo Application Suite - Manage Component - addressed in versions 9.0.28, 9.1.20, 9.2.1
IBM App Connect Enterprise - addressed in versions 12.0.12.28, 13.0.8.0
protobuf.js - addressed in versions 1.5.2, 3.0.0, 7.6.3, 8.6.0
IBM Maximo Application Suite - Manage Component - addressed in versions 9.0.28, 9.1.20, 9.2.1
IBM App Connect Enterprise - addressed in versions 12.0.12.28, 13.0.8.0