High 8.7Published Sep 17, 2026

CVE-2026-89418Uncontrolled Recursion leading to Denial of Service in protobuf-javascript (google-protobuf)

Updated under an hour ago (2026-10-19 11:10 UTC)

Does this affect you?

It affects Google protobuf-javascript (aka google-protobuf npm package). Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Google protobuf-javascript (aka google-protobuf npm package)

Exploited in the last 30 days

google-protobuf contains an unbounded recursion when parsing unknown protobuf group fields. An attacker can send a small crafted payload of deeply nested START_GROUP wire bytes to any Node.js service that calls the generated deserializeBinary() API, causing a RangeError: Maximum call stack size exceeded and crashing the process. No authentication or prior knowledge of the schema is required.

CVSS: 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-674
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Google
NVD analysis: Awaiting Analysis
Record last updated: Sep 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Google protobuf-javascript (aka google-protobuf npm package) google:protobuf_javascript_aka_google_protobuf_npm_package (from the name)	all versions	CNA record

References

https://github.com/protocolbuffers/protobuf-javascript/security/advisories/GHSA-5h29-r2cp-hfmr

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.