CVE-2026-45740
protobufjs: Denial of Service via unbounded recursive JSON descriptor expansion
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.8 and 8.2.0, protobufjs could recurse without a depth limit while expanding nested JSON descriptors through Root.fromJSON() and Namespace.addJSON(). A crafted JSON descriptor with deeply nested namespace definitions could cause the JavaScript call stack to be exhausted during descriptor loading. This vulnerability is fixed in 7.5.8 and 8.2.0.
| CWE | CWE-674 |
| Vendor | protobufjs |
| Product | protobuf.js |
| Published | May 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
protobufjs / protobuf.js
< 7.5.8 >= 8.0.0, < 8.2.0