UBUNTU-CVE-2026-118767

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    UBUNTU-CVE-2026-118767

    Published: 29 Oct 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-118767

    Summary:

    Details: Botan is a C++ cryptography library. From 1.11.22 until 3.13.0, Botan's Python binding converted Python strings containing U+0000 to const char* values without consistently rejecting the embedded NUL, causing bcrypt and check_bcrypt to process only the prefix before the NUL. Applications could validate a longer password but hash a shorter effective value, allowing application password-policy bypass; scrypt and argon2 are unaffected. This issue is fixed in version 3.13.0.

    References: https://ubuntu.com/security/CVE-2026-118767, https://www.cve.org/CVERecord?id=CVE-2026-118767, https://github.com/randombit/botan/commit/5a4ac737e72e18a08eca848049e3dd38571c73b4, https://github.com/randombit/botan/pull/5814, https://github.com/randombit/botan/security/advisories/GHSA-w8gj-5xrm-gvrp

    Affected packages

    Package

    Name: botan

    Purl: pkg:deb/ubuntu/botan?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.4.0-3
    2.4.0-4
    2.4.0-5ubuntu1

    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-2026-118767 | CVE-DB