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TI-2026-26252 Aliases CVE-2026-33894GHSA-ppp5-5v6c-4jwp

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

Priority HIGH 72CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 13 fixed, 7 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-347.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00481 41st percentileScored 2026-11-07
Fix Partial forge (digitalbazaar): 1.4.0node-forge (npm): 1.4.0Red Hat: 12 advisoriesRed Hat: 13 fixed, 7 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
digitalbazaarforgebefore 1.4.01.4.0Patch availableCNA
—node-forge (npm)before 1.4.01.4.0Patch availableGHSA-ppp5-5v6c-4jwp
  • forge Vendordigitalbazaar Affected before 1.4.0 Fixed in 1.4.0 Patch available CNA
  • node-forge (npm) Vendor— Affected before 1.4.0 Fixed in 1.4.0 Patch available GHSA-ppp5-5v6c-4jwp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:digitalbazaar:forge:*:*:*:*:*:node.js:*:*before 1.4.0Vulnerabledigitalbazaar
  • cpe:2.3:a:digitalbazaar:forge:*:*:*:*:*:node.js:*:* Versions before 1.4.0 Vulnerable ·digitalbazaar

Remediation

  • Fix · CNA forge (digitalbazaar) Fixed in 1.4.0
  • Fix · GHSA-ppp5-5v6c-4jwp node-forge (npm) Fixed in 1.4.0 Advisory →

Red Hat 12 advisories

  • RHSA-2026:86618 Released 2026-10-21 · Red Hat rating Critical
    New container image: rhceph-9.2
    • Red Hat Ceph Storage 9.2 registry.redhat.io/rhceph/rhceph-9-rhel10
  • RHSA-2026:34342 Released 2026-07-01 · Red Hat rating Critical
    Cluster Observability Operator 1.5.0
    • Cluster Observability Operator 1.5 registry.redhat.io/cluster-observability-operator/distributed-tracing-console-plugin-pf4-rhel9, registry.redhat.io/cluster-observability-operator/distributed-tracing-console-plugin-pf5-rhel9, registry.redhat.io/cluster-observability-operator/distributed-tracing-console-plugin-pf6-rhel9 +9
  • RHSA-2026:24853 Released 2026-06-09 · Red Hat rating Important
    Red Hat Quay 3.15.5
    • Red Hat Quay 3.15 registry.redhat.io/quay/quay-rhel8
Show 9 more Red Hat advisories
  • RHSA-2026:24761 Released 2026-06-09 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update
    • Red Hat Ansible Automation Platform 2.5 for RHEL 8 automation-controller-venv-tower-4.6.29-2.el8ap, automation-gateway-proxy-server-2.5.10-6.el8ap, automation-gateway-server-2.5.20260422-3.el8ap +4
    • Red Hat Ansible Automation Platform 2.5 for RHEL 9 automation-controller-venv-tower-4.6.29-2.el9ap, automation-gateway-proxy-server-2.6.14-3.el9ap, automation-gateway-server-2.5.20260422-3.el9ap +4
  • RHSA-2026:23361 Released 2026-06-04 · Red Hat rating Important
    Red Hat Quay 3.9.22
    • Red Hat Quay 3.9 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:22840 Released 2026-06-03 · Red Hat rating Important
    Red Hat Quay 3.10.22
    • Red Hat Quay 3.10 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:22629 Released 2026-06-02 · Red Hat rating Important
    Red Hat Quay 3.12.18
    • Red Hat Quay 3.12 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:22465 Released 2026-06-02 · Red Hat rating Important
    Red Hat Quay 3.17.2
    • Red Hat Quay 3.17 registry.redhat.io/quay/quay-rhel9
  • RHSA-2026:21017 Released 2026-05-26 · Red Hat rating Important
    Red Hat Quay 3.14.8
    • Red Hat Quay 3.14 registry.redhat.io/quay/quay-rhel8
  • RHSA-2026:19375 Released 2026-05-19 · Red Hat rating Important
    Red Hat Quay 3.16.4
    • Red Hat Quay 3.16 registry.redhat.io/quay/quay-rhel9
  • RHSA-2026:13826 Released 2026-05-05 · Red Hat rating Critical
    Red Hat Developer Hub 1.9.4 release.
    • Red Hat Developer Hub 1.9 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator
  • RHSA-2026:9742 Released 2026-04-22 · Red Hat rating Critical
    Red Hat Developer Hub 1.8.6 release.
    • Red Hat Developer Hub 1.8 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Logging Subsystem for Red Hat OpenShiftAffectedNo fix planned: Will not fix
Red Hat Ansible Automation Platform 2AffectedNo fix yet
Red Hat Build of Podman DesktopAffectedNo fix yet
Red Hat Data Grid 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Fuse 7AffectedNo fix planned: Will not fix
Red Hat build of Apicurio Registry 2AffectedNo fix yet
Cluster Observability Operator 1.5Fixed RHSA-2026:34342
Red Hat Ansible Automation Platform 2.5 for RHEL 8Fixed RHSA-2026:24761
Red Hat Ansible Automation Platform 2.5 for RHEL 9Fixed RHSA-2026:24761
Red Hat Ceph Storage 9.2Fixed RHSA-2026:86618
Red Hat Developer Hub 1.8Fixed RHSA-2026:9742
Red Hat Developer Hub 1.9Fixed RHSA-2026:13826
Red Hat Quay 3.10Fixed RHSA-2026:22840
Red Hat Quay 3.12Fixed RHSA-2026:22629
Red Hat Quay 3.14Fixed RHSA-2026:21017
Red Hat Quay 3.15Fixed RHSA-2026:24853
Red Hat Quay 3.16Fixed RHSA-2026:19375
Red Hat Quay 3.17Fixed RHSA-2026:22465
Red Hat Quay 3.9Fixed RHSA-2026:23361
Not affected: 20 products
  • Cluster Observability Operator 1.5
  • Cryostat 4
  • Red Hat Ansible Automation Platform 2
  • Red Hat Ansible Automation Platform 2.5 for RHEL 8
  • Red Hat Ansible Automation Platform 2.5 for RHEL 9
  • Red Hat Ceph Storage 9.2
  • Red Hat Developer Hub 1.8
  • Red Hat Developer Hub 1.9
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Process Automation 7
  • Red Hat Quay 3.10
  • Red Hat Quay 3.12
  • Red Hat Quay 3.14
  • Red Hat Quay 3.15
  • Red Hat Quay 3.16
  • Red Hat Quay 3.17
  • Red Hat Quay 3.9
  • Red Hat build of Apache Camel - HawtIO 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33894
  2. 2026-10-03 Alias added: GHSA-ppp5-5v6c-4jwp
  3. 2026-10-21 Fix available: RHSA-2026:86618 · Red Hat
  4. 2026-10-21 Fix available: Red Hat Ceph Storage 9.2 · Red Hat
  5. 2026-11-05 Fix available: Cluster Observability Operator 1.5 · Red Hat

References

Advisory 5

Other 2

  • TI-2026-26254 Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation) CVSS 3.1CRITICAL 9.1
  • TI-2026-82739 ASN.1 resource exhaustion in Forge asn1.fromDer via BIT STRINGs CVSS 3.1HIGH 7.5
  • TI-2026-82735 Denial of service in Forge TLS record processing via stack exhaustion CVSS 3.1HIGH 7.5
  • TI-2026-26253 Forge has signature forgery in Ed25519 due to missing S > L check CVSS 3.1HIGH 7.5
  • TI-2026-26249 Forge has Denial of Service via Infinite Loop in BigInteger.modInverse() with Zero Input CVSS 3.1HIGH 7.5
  • TI-2026-82723 Incomplete PKCS#7 padding validation in Forge decryption CVSS 3.1MEDIUM 5.3
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences