What is CVE-2026-44289?

CVE-2026-44289 is a high-severity vulnerability in Protobufjs Protobuf.js, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-05-13.

How severe is CVE-2026-44289?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Protobufjs Protobuf.js

CVE-2026-44289

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs could recurse without a depth limit while decoding nested protobuf data. This affected both skipping unknown group fields and generated decoding of nested message fields. A crafted protobuf binary payload could cause the JavaScript call stack to be exhausted during decoding. This vulnerability is fixed in 7.5.6 and 8.0.2.

EPSS: 0.006 (47.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

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

Weakness classification (CWE)

References

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

What is CVE-2026-44289?: CVE-2026-44289 is a high-severity vulnerability in Protobufjs Protobuf.js, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-05-13.
How severe is CVE-2026-44289?: High severity. CVSS v3 base score is 7.5 out of 10.