Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-44292

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated message constructors copied enumerable properties from a provided properties object without filtering the __proto__ key. If an application constructed a message from an attacker-controlled plain object, an own enumerable __proto__ property could alter the prototype of that individual message instance. This vulnerability is fixed in 7.5.6 and 8.0.2.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 24.5%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-44292


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