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

{
    "lastseen": "",
    "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 \u201cgarbage\u201d 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.",
    "published": "2026-03-27T20:45:49.583Z",
    "modified": "2026-03-31T14:05:14.708Z",
    "type": "cve",
    "title": "Forge has signature forgery in RSA-PKCS due to ASN.1 extra field",
    "source": "GitHub_M",
    "references": "https://github.com/digitalbazaar/forge/security/advisories/GHSA-ppp5-5v6c-4jwp\nhttps://github.com/digitalbazaar/forge/security/advisories/GHSA-ppp5-5v6c-4jwp\nhttps://datatracker.ietf.org/doc/html/rfc2313#section-8\nhttps://mailarchive.ietf.org/arch/msg/openpgp/5rnE9ZRN1AokBVj3VqblGlP63QE\nhttps://www.rfc-editor.org/rfc/rfc8017.html",
    "id": "CVE-2026-33894",
    "bulletinFamily": "",
    "cwe": [
        "CWE-347",
        "CWE-20"
    ],
    "cvelist": null,
    "sourceData": "digitalbazaar forge < 1.4.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "forge",
    "version": "< 1.4.0",
    "vendor": "digitalbazaar",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}