---
id: CVE-2026-85393
title: >-
  node-forge through 1.4.0 fails to validate element count in nested
  DigestAlgorithm sequences during RSA PKCS#1 v1.5 signature verification
summary: >-
  node-forge through 1.4.0 fails to validate element count in nested
  DigestAlgorithm sequences during RSA PKCS#1 v1.5 signature verification.
  Attackers can embed garbage bytes inside the DigestAlgorithm sequence to forge
  valid signatures f…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-347
  - CWE-1284
published: '2026-09-03'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:43:32.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85393'
references:
  - url: 'https://github.com/advisories/GHSA-ppp5-5v6c-4jwp'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/digitalbazaar/forge'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/asn1.js'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/rsa.js'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/digitalbazaar/forge/issues/1149'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/node-forge-through-1.4.0-rsa-pkcs-1-1.5-signature-forgery-via-nested-digestalgorithm-padding
    label: disclosure@vulncheck.com
  - url: 'https://github.com/advisories/GHSA-ppp5-5v6c-4jwp'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85393.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-85393'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2528186'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-85393'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85393'
  - url: 'https://access.redhat.com/errata/RHSA-2026:71210'
  - url: 'https://access.redhat.com/errata/RHSA-2026:71179'
  - url: 'https://github.com/digitalbazaar/forge/pull/1152'
  - url: 'https://github.com/advisories/GHSA-86w9-cpqp-85rv'
  - url: 'https://access.redhat.com/errata/RHSA-2026:88200'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - ghsa
  - npm
epss: 0.00326
epssPercentile: 0.25549
ingestedAt: '2026-09-24T20:51:40.241Z'
vendor: Red Hat
product: Node HealthCheck Operator
affected:
  - node_healthcheck_operator
  - openshift_pipelines
  - ansible_automation_platform 2
  - build_of_podman_desktop
  - developer_hub
  - enterprise_linux_ai_rhel_ai 3
  - fuse 7
  - openshift_ai_rhoai
  - openshift_gitops
  - quay 3
  - self_service_automation_portal 2
  - ansible_automation_platform 2.5
  - ansible_automation_platform 2.6
patched:
  - ansible_automation_platform 2.5
  - ansible_automation_platform 2.6
aliases:
  - GHSA-86w9-cpqp-85rv
ecosystem: npm
---

## Overview

node-forge through 1.4.0 fails to validate element count in nested DigestAlgorithm sequences during RSA PKCS#1 v1.5 signature verification. Attackers can embed garbage bytes inside the DigestAlgorithm sequence to forge valid signatures for arbitrary messages using low-exponent RSA keys. This is an incomplete fix for CVE-2026-33894.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:71210** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.5 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:71210)
- **RHSA-2026:71179** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.6 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:71179)
- **Red Hat VEX** · Important · affected: Node HealthCheck Operator, OpenShift Pipelines, Red Hat Ansible Automation Platform 2, Red Hat Build of Podman Desktop, Red Hat Developer Hub, Red Hat Enterprise Linux AI (RHEL AI) 3, … · no fix planned: Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat Fuse 7, Red Hat OpenShift GitOps, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85393.json)
- **RHSA-2026:88200** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.2 · released 2026-10-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:88200)

## Package advisory (CVE-2026-85393)

Affected packages:

- `node-forge <= 1.4.0`

Source: https://github.com/advisories/GHSA-86w9-cpqp-85rv