CVE-2026-33894

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://datatracker.ietf.org/doc/html/rfc2313#section-8
https://github.com/digitalbazaar/forge/security/advisories/GHSA-ppp5-5v6c-4jwp
https://github.com/digitalbazaar/forge/security/advisories/GHSA-ppp5-5v6c-4jwp
https://mailarchive.ietf.org/arch/msg/openpgp/5rnE9ZRN1AokBVj3VqblGlP63QE
https://www.rfc-editor.org/rfc/rfc8017.html

Configurations

No configuration.

History

No history.

Information

Published : 2026-03-27 21:17

Updated : 2026-03-30 13:26

NVD link : CVE-2026-33894

Mitre link : CVE-2026-33894

CVE.ORG link : CVE-2026-33894

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

CWE-347

Improper Verification of Cryptographic Signature

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