High [CVE-2026-85393] Signature forgery vulnerability in RSA PKCS#1 v1.5 verification
This high-severity Red Hat Linux advisory covers CVE-2026-85393 affecting Gatekeeper 3, Node HealthCheck Operator, OpenShift Pipelines.
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Summary
A flaw was found in node-forge. This vulnerability allows a remote attacker to forge valid RSA PKCS#1 v1.5 signatures for arbitrary messages.
The flaw occurs because the software fails to properly validate the element count in nested DigestAlgorithm sequences during signature verification. By embedding specially crafted data, an attacker can bypass signature validation, leading to potential integrity compromise.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N). Weakness: CWE-1284.
Affected Red Hat products: Gatekeeper 3; Node HealthCheck Operator; OpenShift Pipelines; OpenShift Service Mesh 3; Red Hat 3scale API Management Platform 2; Red Hat Ansible Automation Platform 2; Red Hat build of Apache Camel for Spring Boot 4; Red Hat Build of Podman Desktop; Red Hat Ceph Storage 4; Red Hat Connectivity Link 1; Red Hat Developer Hub; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat Fuse 7; Red Hat Hardened Images; Red Hat OpenShift AI (RHOAI); Red Hat OpenShift Container Platform 4; Red Hat OpenShift GitOps; Red Hat Quay 3; Self-service automation portal 2.
Red Hat lists Red Hat AMQ Broker 7; Red Hat Hardened Images as not affected. Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
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