🛡️ CVE-2026-44288
🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-176 NVD
5.3
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 includes a minimal UTF-8 decoder that accepted overlong UTF-8 byte sequences and decoded them to their canonical characters instead of replacing them. An attacker who can provide protobuf binary data decoded through the affected UTF-8 path may be able to bypass application-level checks that inspect raw bytes before protobuf string decoding. For example, bytes that do not contain certain ASCII characters could decode to strings containing those characters. This vulnerability is fixed in 7.5.6 and 8.0.2.

Details

Severity Medium
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE CWE-176
Public Exploit ✅ 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/utf8 — —
protobufjs — —
unknown — —

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