UBUNTU-CVE-2026-85393

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    UBUNTU-CVE-2026-85393

    Published: 3 Sept 2026Last Modified: 16 Sept 2026
    Upstream:
    CVE-2026-85393

    Summary:

    Details: node-forge through 1.4.0 fails to validate element count in nested DigestAlgorithm sequences during RSA PKCS#1 v1.5 signature verification. Attackers can embed garbage bytes inside the DigestAlgorithm sequence to forge valid signatures for arbitrary messages using low-exponent RSA keys. This is an incomplete fix for CVE-2026-33894.

    References: https://ubuntu.com/security/CVE-2026-85393, https://www.cve.org/CVERecord?id=CVE-2026-85393, https://github.com/advisories/GHSA-ppp5-5v6c-4jwp, https://github.com/digitalbazaar/forge, https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/asn1.js, https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/rsa.js, https://github.com/digitalbazaar/forge/issues/1149, https://www.vulncheck.com/advisories/node-forge-through-1.4.0-rsa-pkcs-1-1.5-signature-forgery-via-nested-digestalgorithm-padding

    Affected packages

    Package

    Name: node-node-forge

    Purl: pkg:deb/ubuntu/node-node-forge?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.8.5~dfsg-2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2026-85393 | CVE-DB