Vulnerability · Published May 13, 2026 · Assigned by GitHub_M

CVE-2026-44290protobufjs: Process-wide denial of service through unsafe option paths

High 7.5

In plain English

A high-severity prototype pollution in protobuf.js from protobufjs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 68.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs allowed certain schema option paths to traverse through inherited object properties while applying options. A crafted protobuf schema or JSON descriptor could cause option handling to write to properties on global JavaScript constructors, corrupting process-wide built-in functionality. This vulnerability is fixed in 7.5.6 and 8.0.2.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	protobufjs	7.5.6	GHSA-jvwf-75h9-cwgg
npm	protobufjs	8.0.2	GHSA-jvwf-75h9-cwgg

Affected products (as reported)

Vendor	Product	Versions
protobufjs	protobuf.js	< 7.5.6>= 8.0.0, < 8.0.2

Weakness: CWE-1321 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-jvwf-75h9-cwgg x_refsource_CONFIRM