What is CVE-2026-48712?

CVE-2026-48712 is a high-severity vulnerability in Protobufjs Protobuf.js, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-06-22.

How severe is CVE-2026-48712?

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

Vulnerability in Protobufjs Protobuf.js

CVE-2026-48712

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.6.1 and 8.4.1, protobufjs could recurse without a depth limit while converting decoded messages to plain objects or JSON. This affected generated toObject() conversion and the custom google.protobuf.Any JSON conversion path. A crafted protobuf binary payload containing deeply nested Any values could cause the JavaScript call stack to be exhausted during conversion to JSON. This vulnerability is fixed in 7.6.1 and 8.4.1.

Published 2026-06-22 · last modified 2026-06-26.

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.

EPSS exploit prediction

EPSS: 0.005 (37.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Protobufjs Protobuf.js — versions < 7.6.1, >= 8.0.0, < 8.4.1
Protobufjs Project

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

github.com/protobufjs/protobuf.js/security/advisories/GHSA-wcpc-wj8m-hjx6 (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-48712?: CVE-2026-48712 is a high-severity vulnerability in Protobufjs Protobuf.js, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-06-22.
How severe is CVE-2026-48712?: High severity. CVSS v3 base score is 7.5 out of 10.