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.
Project Subscriptions
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Advisories
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Github GHSA |
GHSA-ppp5-5v6c-4jwp | Forge has signature forgery in RSA-PKCS due to ASN.1 extra field |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Sat, 28 Mar 2026 12:15:00 +0000
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threat_severity
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threat_severity
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Sat, 28 Mar 2026 03:15:00 +0000
| Type | Values Removed | Values Added |
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| Description | 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. | |
| Title | Forge has signature forgery in RSA-PKCS due to ASN.1 extra field | |
| Weaknesses | CWE-20 CWE-347 |
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cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-03-27T20:45:49.583Z
Reserved: 2026-03-24T15:41:47.489Z
Link: CVE-2026-33894
No data.
Status : Received
Published: 2026-03-27T21:17:25.983
Modified: 2026-03-27T21:17:25.983
Link: CVE-2026-33894
OpenCVE Enrichment
No data.
Github GHSA