Uncontrolled Recursion in protobufjs-cli and protobuf.js - CVE-2026-54269
Published: June 13, 2026
Vulnerability identifier: #VU134484
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-54269
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: protobuf.js
Affected software:
protobufjs-cli
protobuf.js
protobufjs-cli
protobuf.js
Detailed vulnerability description
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.
How to mitigate CVE-2026-54269
Install security update from vendor's website.