What is CVE-2026-44288?

CVE-2026-44288 is a medium-severity vulnerability in Protobufjs Protobuf.js, classified under CWE-176. CVSS score: 5.3/10. Published 2026-05-13.

How severe is CVE-2026-44288?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Protobufjs Protobuf.js

CVE-2026-44288

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 inste…

EPSS: 0.000 (2.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Protobufjs Protobuf.js — versions < 7.5.6, >= 8.0.0, < 8.0.2
Protobufjs_project Protobufjs

Weakness classification (CWE)

CWE-176

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44288?: CVE-2026-44288 is a medium-severity vulnerability in Protobufjs Protobuf.js, classified under CWE-176. CVSS score: 5.3/10. Published 2026-05-13.
How severe is CVE-2026-44288?: Medium severity. CVSS v3 base score is 5.3 out of 10.