CVE-2026-44291
protobufjs compiles protobuf definitions into JavaScript (JS) functions.
Published May 13, 2026 · updated Jun 17, 2026 · protobufjs project protobufjs
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs used plain objects with inherited prototypes for internal type lookup tables used by generated encode and decode functions. If Object.prototype had already been polluted, those lookup tables could resolve attacker-controlled inherited properties as valid protobuf type information. This could cause attacker-controlled strings to be emitted into generated JavaScript code. This vulnerability is fixed in 7.5.6 and 8.0.2.
Code
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Timeline
Detection, updates, and resolution for this record.
May 13, 2026 · NIST NVD
Detected
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs used plain objects with inherited prototypes for internal type lookup tables used by generated encode and decode functions. If Object.prototype had already been polluted, those lookup tables could resolve attacker-controlled inherited properties as valid protobuf type information. This cou
Jun 17, 2026 · NIST NVD
Updated
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs used plain objects with inherited prototypes for internal type lookup tables used by generated encode and decode functions. If Object.prototype had already been polluted, those lookup tables could resolve attacker-controlled inherited properties as valid protobuf type information. This cou
Affected
- cpe protobufjs project/protobufjsversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-44291
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-44291
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs used plain objects with inherited prototypes for internal type lookup tables used by generated encode and decode functions. If Object.prototype had already been polluted,
nvd.nist.gov