CVE-2026-44288 — protobufjs: Overlong UTF-8 decoding

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
protobufjs / protobuf.js	affected < 7.5.6; affected >= 8.0.0, < 8.0.2

CWE

CWE-176

References

https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-q6x5-8v7m-xcrf

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.