Low · CVSS 2.9CVE-2026-118781

Forge: Denial of Service via infinite loop in BigInteger.modInverse() with negative input (incomplete fix of CVE-2026-33891)CVE-2026-118781

Answer in brief

CVE-2026-118781 records a Low severity (CVSS 2.9) vulnerability in Forge: Denial of Service via infinite loop in BigInteger.modInverse() with negative input (incomplete fix of CVE-2026-33891). The current sources do not mark it as known exploited. The current feed maps digitalbazaar/forge (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 29, 2026Updated Oct 29, 2026Source checked Oct 29, 2026First seen by HOL Oct 29, 2026Material review Oct 29, 2026

Upstream Advisory

Key facts

Risk: Low · CVSS 2.9
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 2.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps digitalbazaar/forge (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
digitalbazaar/forgegeneric	<1.4.1	1.4.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for digitalbazaar/forge.
Review the reported fix. Update digitalbazaar/forge to 1.4.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 29, 2026

Sources and claim methodology

Upstream source description

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the affected implementation used BigInteger.prototype.modInverse(), bnModInverse(), lib/jsbn.js, RSA public exponent e to process the relevant input or security decision. node-forge's bundled jsbn implementation entered an infinite loop when BigInteger.prototype.modInverse() received a negative value or modulus. An attacker who could control the RSA public exponent passed to key generation, or a direct modInverse() operand, could block the Node.js event loop at full CPU. Parsed DER, PEM, JWK, PKCS#12, X.509, and TLS values are unsigned and cannot trigger this issue. This issue is fixed in version 1.4.1.

Quoted source text, attributed separately from HOL analysis.