CVE-2026-44288
CVE-2026-44288 · protobufjs: Overlong UTF-8 decoding
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 5.3 · Medium · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
protobuf.js
- Versions
- < 7.5.6: Affected
- >= 8.0.0, < 8.0.2: Affected
No fix published
protobufjs npm
- Affected ranges
- SEMVER: < 7.5.6
Update to 7.5.6
protobufjs npm
- Affected ranges
- SEMVER: ≥ 8.0.0, < 8.0.2
Update to 8.0.2
@protobufjs/utf8 npm
- Affected ranges
- SEMVER: < 1.1.1
Update to 1.1.1