What is CVE-2026-44293?

CVE-2026-44293 is a high-severity vulnerability in Protobufjs Protobuf.js, classified under Code Injection. CVSS score: 8.8/10. Published 2026-05-13.

How severe is CVE-2026-44293?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Protobufjs Protobuf.js

CVE-2026-44293

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript for toObject conversion could include an unsafe expression derived from a schema-controlled bytes field defa…

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.001 (18.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

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

Weakness classification (CWE)

CWE-94 — Code Injection

References

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

Frequently asked questions

What is CVE-2026-44293?: CVE-2026-44293 is a high-severity vulnerability in Protobufjs Protobuf.js, classified under Code Injection. CVSS score: 8.8/10. Published 2026-05-13.
How severe is CVE-2026-44293?: High severity. CVSS v3 base score is 8.8 out of 10.