Forge (node-forge) RSASSA PKCS#1 v1.5 forgery e=3 v<1.4
CVE-2026-33894 Published on March 27, 2026

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

NVD

Vulnerability Analysis

CVE-2026-33894 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. An automatable proof of concept (POC) exploit exists. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and no impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
HIGH
Availability Impact:
NONE

Weakness Types

Improper Verification of Cryptographic Signature

The software does not verify, or incorrectly verifies, the cryptographic signature for data.

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.


Products Associated with CVE-2026-33894

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-33894 are published in these products:

Digitalbazaar Forge
 
Red Hat Ansible Automation Platform
 
Red Hat Ansible Automation Platform Developer
 
Red Hat Ansible Automation Platform Inside
 
Red Hat Rhdh
 
Red Hat Quay
 
Red Hat Logging
 
Red Hat Service Registry
 
Red Hat Podman Desktop
 
Red Hat Jboss Data Grid
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Jboss Fuse
 
Red Hat Cryostat
 
Red Hat Apache Camel Hawtio
 
Red Hat Jboss Enterprise Bpms Platform
 
Red Hat Cluster Observability Operator
 

Affected Versions

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

Exploit Probability

EPSS
0.25%
Percentile
15.36%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.