CVE-2026-33894

CVE-2026-33894 · Forge has signature forgery in RSA-PKCS due to ASN.1 extra field

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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 7.5 · Élevée · EPSS 0,5% · Correctif disponible

Publication

2026-03-27T20:45:49.583Z

Mise à jour

2026-09-10T12:04:55.128Z

Pile logicielle: system · node

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