Vulnerability · Published Oct 29, 2026 · Assigned by GitHub_M

CVE-2026-118775Forge: ASN.1 OID first arc truncation in asn1.oidToDer

Low 3.7

In plain English

A low-severity integer overflow in forge from digitalbazaar. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.3%top 75.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, asn1.oidToDer() in lib/asn1.js did not range-check the first two arcs of an OID. An application that accepted an untrusted OID string, checked or authorized that string, and then encoded it with asn1.oidToDer() could emit DER representing a different, trusted OID from the one that was checked. DER parsing is not affected. This issue is fixed in version 1.4.1.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Ubuntu:22.04:LTS	node-node-forge	no fix listed	UBUNTU-CVE-2026-118775
npm	node-forge	1.4.1	GHSA-4642-5mcj-2rqw

Affected products (as reported)

Vendor	Product	Versions
digitalbazaar	forge	< 1.4.1

Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

References

https://github.com/digitalbazaar/forge/security/advisories/GHSA-4642-5mcj-2rqw x_refsource_CONFIRM
https://github.com/digitalbazaar/forge/commit/e56a3dde8e4e63bae566bb32546eeaf92f515e1e x_refsource_MISC
https://github.com/digitalbazaar/forge/releases/tag/v1.4.1 x_refsource_MISC