Input validation error in protobuf.js - CVE-2026-44294
Published: May 12, 2026
Vulnerability identifier: #VU131163
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-2026-44294
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: protobuf.js
Affected software:
protobuf.js
protobuf.js
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in generated JavaScript property accessors when processing an attacker-controlled protobuf schema or JSON descriptor. A remote attacker can provide a crafted schema or descriptor with control characters in field names to cause a denial of service.
Only applications that allow untrusted schemas or descriptors and trigger runtime code generation for affected message types are vulnerable.
How to mitigate CVE-2026-44294
Install security update from vendor's website.