CVE-2026-44288 (GCVE-0-2026-44288)

Vulnerability from cvelistv5 – Published: 2026-05-13 14:37 – Updated: 2026-05-13 18:33
VLAI
Title
protobufjs: Overlong UTF-8 decoding
Summary
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 18:33 UTC
CWE
  • CWE-176 - Improper Handling of Unicode Encoding
Assigner
References
Impacted products
Vendor Product Version
protobufjs protobuf.js Affected: < 7.5.6
Affected: >= 8.0.0, < 8.0.2
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