CVE-2025-66031: node-forge ASN.1 Unbounded Recursion

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-11-26 · updated 2026-10-18
Weakness: CWE-674

Description

Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Uncontrolled Recursion vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft deep ASN.1 structures that trigger unbounded recursive parsing. This leads to a Denial-of-Service (DoS) via stack exhaustion when parsing untrusted DER inputs. This issue has been patched in version 1.3.2.

Affected products

digitalbazaar forge: before 1.3.2 — fixed in 1.3.2
Npm Node-Forge: before 1.3.2 — fixed in 1.3.2

How to fix

Upgrade to a fixed version: digitalbazaar forge 1.3.2; Npm Node-Forge 1.3.2. Check the vendor advisory for mitigations.

References

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