CVE-2026-118776

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    CVE-2026-118776

    Published: 29 Oct 2026Last Modified: 5 Nov 2026

    Summary: Forge: Incomplete PKCS#7 padding validation in AES/DES CBC and ECB decryption

    Details: Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the affected implementation used decipher.finish(), CBC and ECB modes, PKCS#7 padding to process the relevant input or security decision. node-forge validated only the final byte of PKCS#7 padding during CBC and ECB decryption and accepted zero, oversized, or mismatched padding bytes. Malformed ciphertext could consequently be accepted and up to four plaintext blocks could be silently removed, causing an integrity failure in applications that treated successful decryption as proof of valid padding. This issue is fixed in version 1.4.1.

    References: https://github.com/digitalbazaar/forge/releases/tag/v1.4.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118776.json, https://github.com/digitalbazaar/forge/security/advisories/GHSA-2vgq-wchc-25w7, https://nvd.nist.gov/vuln/detail/CVE-2026-118776, https://github.com/digitalbazaar/forge/commit/81774ff99e2da64aec9a43591df45a360040c136

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -8a917370ec51731e817c2d547b7329a58f8210af

    Affected versions

    v1.4.0

    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
    CVE-2026-118776 | CVE-DB