protobufjs: Text Format string map parsing can mutate returned map object prototype
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.8epss 0.2%
exploitation probability
0.2%top 87% of all CVEs
observed exploitation
nono source reports it
protobufjs compiles protobuf definitions into JavaScript (JS) functions. From 8.2.0 until 8.6.5, the protobufjs Text Format extension parsed string-keyed map entries using ordinary property assignment, allowing a map entry with key __proto__ to change the prototype of the returned map object instead of creating an own map entry in protobufjs/ext/textformat. This issue is fixed in version 8.6.5.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected products
protobufjs · protobuf.jsReferences
https://github.com/protobufjs/protobuf.js/commit/9f97fe413072d3beb52c74e62d88ea8adc9444d8https://github.com/protobufjs/protobuf.js/pull/2335https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.6.5https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-jfj6-75fj-8934