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Fencer Vulns
high 7.5

CVE-2026-33894 json

Forge has signature forgery in RSA-PKCS due to ASN.1 extra field

published 2026-03-26 7 mo ago modified 2026-10-26 13 d ago also CVE-2026-85393 , EUVD-2026-16834 , GHSA-86w9-cpqp-85rv , GHSA-ppp5-5v6c-4jwp

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, RSASSA PKCS#1 v1.5 signature verification accepts forged signatures for low public exponent keys (e=3). Attackers can forge signatures by stuffing “garbage” bytes within the ASN structure in order to construct a signature that passes verification, enabling Bleichenbacher style forgery. This issue is similar to CVE-2022-24771, but adds bytes in an addition field within the ASN structure, rather than outside of it. Additionally, forge does not validate that signatures include a minimum of 8 bytes of padding as defined by the specification, providing attackers additional space to construct Bleichenbacher forgeries. Version 1.4.0 patches the issue.

Patch / fix

  • npm node-forge 1.4.0
  • Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 8 0:2.5.20260422-3.el8ap
  • Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 9 0:2.5.20260422-3.el9ap
  • Red Hat Cluster Observability Operator 1.5.0 1782839279
  • Red Hat Red Hat Developer Hub 1.8 1776784286
  • Red Hat Red Hat Developer Hub 1.9 1777903262
  • Red Hat Red Hat Quay 3.10 1779822261
  • Red Hat Red Hat Quay 3.12 1779811412
  • Red Hat Red Hat Quay 3.14 1779689392
  • Red Hat Red Hat Quay 3.15 1780891395
  • Red Hat Red Hat Quay 3.16 1779204086
  • Red Hat Red Hat Quay 3.17 1779922205
  • Red Hat Red Hat Quay 3.9 1779811473
  • receptor ansible automation platform inside 2.5, ansible automation platform developer 2.5, ansible automation platform 2.5 1.6.5-1.el8ap
  • receptor ansible automation platform inside 2.5, ansible automation platform developer 2.5, ansible automation platform 2.5 1.6.5-1.el9ap
  • python3.12-click ansible automation platform inside 2.5, ansible automation platform developer 2.5, ansible automation platform 2.5 8.3.3-1.el8ap
  • python3.12-click ansible automation platform inside 2.5, ansible automation platform developer 2.5, ansible automation platform 2.5 8.3.3-1.el9ap
  • python3.12-pillow ansible automation platform 2.5 12.2.0-1.el8ap
  • python3.12-pillow ansible automation platform 2.5 12.2.0-1.el9ap
  • python3.12-cryptography ansible automation platform inside 2.5, ansible automation platform developer 2.5, ansible automation platform 2.5 46.0.7-1.el8ap
  • python3.12-cryptography ansible automation platform inside 2.5, ansible automation platform developer 2.5, ansible automation platform 2.5 46.0.7-1.el9ap

red hat advisories RHSA-2026:24761

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-33894 updated cvss 7.5

node-forge: Forge: Signature Forgery via Weak RSASSA PKCS#1 v1.5 Verification

  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/kibana6-rhel8, openshift-logging/elasticsearch6-rhel9, openshift-logging/logging-curator5-rhel9, openshift-logging/elasticsearch-proxy-rhel9, openshift-logging/elasticsearch-rhel9-operator, openshift-logging/elasticsearch-operator-bundle
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2 automation-platform-ui Red Hat build of Apicurio Registry 2 io.apicurio-apicurio-registry Red Hat Build of Podman Desktop podman-desktop-macos-1-0, podman-desktop-windows-1-0 Red Hat Data Grid 8 org.infinispan-infinispan-console Red Hat Enterprise Linux 9 pcs, pcs-snmp
    affected: workaround, no fix available
  • Red Hat Fuse 7 io.apicurio-apicurito, io.syndesis-syndesis-parent
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/logging-console-plugin-pf4-rhel9 1782839279
    fixed: vendor fix RHSA-2026:34342
  • Red Hat Ansible Automation Platform 2.5 for RHEL 8 automation-gateway-server 2.5.20260422-3.el8ap Red Hat Ansible Automation Platform 2.5 for RHEL 9 automation-gateway-server 2.5.20260422-3.el9ap
    fixed: vendor fix RHSA-2026:24761
  • Red Hat Ceph Storage 9.2 rhceph/rhceph-9-rhel10 1790843527
    fixed: vendor fix RHSA-2026:86618
  • Red Hat Developer Hub 1.8 rhdh 1776784286
    fixed: vendor fix RHSA-2026:9742
  • Red Hat Developer Hub 1.9 rhdh 1777903262
    fixed: vendor fix RHSA-2026:13826
show 12 more
  • Red Hat Quay 3.9 quay/quay-rhel8 1779811473
    fixed: vendor fix RHSA-2026:23361
  • Red Hat Quay 3.10 quay/quay-rhel8 1779822261
    fixed: vendor fix RHSA-2026:22840
  • Red Hat Quay 3.12 quay/quay-rhel8 1779811412
    fixed: vendor fix RHSA-2026:22629
  • Red Hat Quay 3.14 quay/quay-rhel8 1779689392
    fixed: vendor fix RHSA-2026:21017
  • Red Hat Quay 3.15 quay/quay-rhel8 1780891395
    fixed: vendor fix RHSA-2026:24853
  • Red Hat Quay 3.16 quay 1779204086
    fixed: vendor fix RHSA-2026:19375
  • Red Hat Quay 3.17 quay/quay-rhel9 1779922205
    fixed: vendor fix RHSA-2026:22465
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/perses-rhel9 1782839109, cluster-observability-operator/thanos-rhel9 1782840280, cluster-observability-operator/korrel8r-rhel9 1782839157, cluster-observability-operator/prometheus-rhel9 1782840780, cluster-observability-operator/alertmanager-rhel9 1782840761, cluster-observability-operator/perses-rhel9-operator 1782839191, +18 more
    not affected: vulnerable code not present
  • Red Hat Cryostat 4 io.cryostat-cryostat
    not affected: component not present
  • Red Hat Ansible Automation Platform 2 automation-eda-controller Red Hat Ansible Automation Platform 2.5 for RHEL 8 receptor 1.6.5-1.el8ap, receptorctl 1.6.5-1.el8ap, automation-hub 4.10.15-1.el8ap, python3.12-click 8.3.3-1.el8ap, python3.12-pillow 12.2.0-1.el8ap, python3.12-pulpcore 3.49.61-1.el8ap, +12 more Red Hat Ansible Automation Platform 2.5 for RHEL 9 receptor 1.6.5-1.el9ap, receptorctl 1.6.5-1.el9ap, automation-hub 4.10.15-1.el9ap, python3.12-click 8.3.3-1.el9ap, python3.12-pillow 12.2.0-1.el9ap, python3.12-pulpcore 3.49.61-1.el9ap, +12 more Red Hat build of Apache Camel - HawtIO 4 io.hawt-project Red Hat Ceph Storage 9.2 rhceph/alloy-rhel10 1790774976, rhceph/grafana-rhel10 1790774121, rhceph/keepalived-rhel10 1790842990, rhceph/oauth2-proxy-rhel10 1790774021, rhceph/snmp-notifier-rhel10 1790773439, rhceph/rhceph-haproxy-rhel10 1790846345 Red Hat Developer Hub 1.8 rhdh 1776783947, rhdh 1776787729
    +2 more products
    Red Hat Developer Hub 1.9 rhdh 1777902709, rhdh 1777909942 Red Hat Enterprise Linux 8 pcs, pcs-snmp
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 9 grafana, grafana-selinux Red Hat Enterprise Linux 10 grafana Red Hat Process Automation 7 org.uberfire-uberfire-parent
    not affected: component not present
  • Red Hat Quay 3.9 quay/clair-rhel8 1779233282, quay/quay-builder-rhel8 1779233301, quay/quay-operator-rhel8 1779233286, quay/quay-operator-bundle 1779815781, quay/quay-bridge-operator-rhel8 1779233279, quay/quay-bridge-operator-bundle 1779233747, +3 more Red Hat Quay 3.10 quay/clair-rhel8 1779218496, quay/quay-builder-rhel8 1779218527, quay/quay-operator-rhel8 1779218475, quay/quay-operator-bundle 1779825814, quay/quay-bridge-operator-rhel8 1779218452, quay/quay-bridge-operator-bundle 1779219320, +3 more Red Hat Quay 3.12 quay/clair-rhel8 1779201791, quay/quay-builder-rhel8 1779201784, quay/quay-operator-rhel8 1779201803, quay/quay-operator-bundle 1779841290, quay/quay-bridge-operator-rhel8 1779212189, quay/quay-bridge-operator-bundle 1779212764, +3 more Red Hat Quay 3.14 quay/clair-rhel8 1778873589, quay/quay-builder-rhel8 1778873627, quay/quay-operator-rhel8 1778873585, quay/quay-operator-bundle 1779693417, quay/quay-bridge-operator-rhel8 1778873623, quay/quay-bridge-operator-bundle 1778874411, +2 more Red Hat Quay 3.15 quay/clair-rhel8 1780584775, quay/quay-builder-rhel8 1780584626, quay/quay-operator-rhel8 1780584287, quay/quay-operator-bundle 1780894591, quay/quay-bridge-operator-rhel8 1780584376, quay/quay-bridge-operator-bundle 1780585598, +3 more Red Hat Quay 3.16 quay 1778704509, quay 1778704515, quay 1778704550, quay 1778704556, quay 1778705015, quay 1778705065, +3 more
    +1 more products
    Red Hat Quay 3.17 quay/clair-rhel9 1778600005, quay/quay-builder-rhel9 1778599977, quay/quay-operator-rhel9 1778839890, quay/quay-operator-bundle 1779929597, quay/quay-bridge-operator-rhel9 1778599998, quay/quay-bridge-operator-bundle 1778601553, +3 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm node-forge
<=1.4.0
<1.4.0
1.4.0

Affected products

  • digitalbazaar forge
  • Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 8
  • Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 9
  • Red Hat Cluster Observability Operator 1.5.0
  • Red Hat Red Hat Developer Hub 1.8
  • Red Hat Red Hat Developer Hub 1.9
  • Red Hat Red Hat Quay 3.10
  • Red Hat Red Hat Quay 3.12
  • Red Hat Red Hat Quay 3.14
  • Red Hat Red Hat Quay 3.15
  • Red Hat Red Hat Quay 3.16
  • Red Hat Red Hat Quay 3.17
  • Red Hat Red Hat Quay 3.9
  • Red Hat Cryostat 4
  • Red Hat Logging Subsystem for Red Hat OpenShift
  • Red Hat Red Hat Ansible Automation Platform 2
  • Red Hat Red Hat build of Apache Camel - HawtIO 4
  • Red Hat Red Hat build of Apicurio Registry 2
  • Red Hat Red Hat Build of Podman Desktop
  • Red Hat Red Hat Data Grid 8
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Fuse 7
  • Red Hat Red Hat Process Automation 7

Classification

Weakness
  • CWE-347 Improper Verification of Cryptographic Signature
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.