๐Ÿ›ก๏ธ CVE-2026-44291
๐ŸŸ  CVSS 8.1 โ€” High โœ… No Known Exploit CWE-1321 NVD
8.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity HIGH
CVSS Score 8.1
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-1321
Public Exploit โœ… No
Source NVD
Published 2026-05-12
Updated 2026-06-15
Modified 2026-05-14
Fix URL N/A

Affected Packages

Software From version Fixed in
protobufjs โ€” โ€”
unknown โ€” โ€”

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