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Medium, CVSS 6.3amended

node-forge is vulnerable to ASN.1 OID Integer Truncation

CVE-2025-66030GHSA-65ch-62r8-g69g

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (node-forge 1.3.2), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
6.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2025-66030: 0.33% estimated exploitation activity in the next 30 days; percentile 26.23 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary MITRE-Formatted CVE Description An Integer Overflow (CWE-190) vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft ASN.1 structures containing OIDs with oversized arcs. These arcs may be decoded as smaller, trusted OIDs due to 32-bit bitwise truncation, enabling the bypass of downstream OID-based security decisions. Description An ASN.1 OID Integer Truncation vulnerability exists in the node-forge asn1.derToOid function within forge/lib/asn1.js. OID components are decoded using JavaScript's bitwise left-shift operator (<<), which forcibly casts values to 32-bit signed integers. Consequently, if an attacker provides a mathematically unique, very large OID arc integer exceeding $2^{31}-1$, the value silently overflows and wraps around rather than throwing an error. Impact This vulnerability allows a specially crafted ASN.1 object to spoof an OID, where a malicious certificate with a massive, invalid OID is misinterpreted by the…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-65ch-62r8-g69g

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-65ch-62r8-g69g

Agent brief

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# Patch Next advisory brief: CVE-2025-66030

Advisory: node-forge is vulnerable to ASN.1 OID Integer Truncation
IDs: CVE-2025-66030, GHSA-65ch-62r8-g69g
Record: https://patchnext.com/advisories/cve-2025-66030 (revision 3, source checked 26 Oct 2026, 12:38 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: node-forge 1.3.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm node-forge: affected < 1.3.2; fixed in 1.3.2

## Suggested inspection (read-only)
- `npm ls node-forge --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on node-forge.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-65ch-62r8-g69g (OSV record GHSA-65ch-62r8-g69g lists affected ranges: npm node-forge >=0 <1.3.2 (fixed))
- Verified: https://github.com/advisories/GHSA-65ch-62r8-g69g (GitHub-reviewed advisory GHSA-65ch-62r8-g69g lists affected ranges: npm node-forge >=0 <1.3.2)

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