UBUNTU-CVE-2026-69248

    Dashboard / Vulnerabilities / UBUNTU-CVE-2026-69248

    UBUNTU-CVE-2026-69248

    Published: 3 Aug 2026Last Modified: 17 Sept 2026
    Upstream:
    CVE-2026-69248
    Aliases:
    USN-8776-1

    Summary:

    Details: cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In versions 45.0.0 through 48.0.0, if an intermediate constrained CA permits the DNS name foo.example.com, and the leaf certificate has a wildcard in its DNS SAN of *.example.com, python-cryptography's verifier accepts which allows escaping outside of the permitted names. The core issue is in DNSConstraint::matches, where a wildcard pattern was treated as matching a more-specific permitted constraint even though *.example.com can expand to sibling names such as bar.example.com outside foo.example.com. This allows acceptance of an invalid certificate chain. This issue is fixed in 49.0.0.

    References: https://ubuntu.com/security/CVE-2026-69248, https://www.cve.org/CVERecord?id=CVE-2026-69248, https://github.com/pyca/cryptography/security/advisories/GHSA-m2h6-j472-rp4c, https://github.com/pyca/cryptography/pull/14888, https://github.com/pyca/cryptography/commit/4d035a4225965edeffd312079a510ef25fcfdcb2, https://ubuntu.com/security/notices/USN-8776-1

    Affected packages

    Package

    Name: python-cryptography

    Purl: pkg:deb/ubuntu/python-cryptography?arch=source&distro=resolute

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -46.0.5-1ubuntu2.2

    Affected versions

    43.0.0-1ubuntu1

    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-2026-69248 | CVE-DB