Description
protobufjs compiles protobuf definitions into JavaScript (JS) functions. From 8.2.0 to 8.4.2, protobufjs preserved unknown wire elements in message.$unknowns and did not provide a decode-time option to discard unknown fields before retaining them. A crafted protobuf payload containing many unknown fields could therefore cause a decoded message to retain substantially more memory than the input size would suggest, even when unknown-field round-tripping is not needed. protobufjs 8.5.0 added the relevant decode-time options, allowing applications that decode untrusted protobuf data to disable unknown-field retention during decode. protobufjs 8.6.2 flips the default so unknown fields are discarded unless explicitly opted into.
Severity (CVSS)
| Base score | 5.3 |
|---|---|
| Severity | Medium |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Provided by | CNA |
Weaknesses
- CWE-770 — CWE-770: Allocation of Resources Without Limits or Throttling
Affected products
| Vendor | Product | Versions |
|---|---|---|
| protobufjs | protobuf.js | >=8.2.0, < 8.5.0 |
References
- https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-94rc-8x27-4472 (x_refsource_CONFIRM)
Generated from the official CVE List on 23 Jun 2026 10:05 UTC.