UBUNTU-CVE-2026-80255

    Dashboard / Vulnerabilities / UBUNTU-CVE-2026-80255

    UBUNTU-CVE-2026-80255

    Published: 6 Sept 2026Last Modified: 26 Sept 2026
    Upstream:
    CVE-2026-80255
    Aliases:
    USN-8820-1

    Summary:

    Details: A `Set-Cookie:` header using tab (horizontal tab, ASCII code 9) instead of space (ascii code 32) immediately before the `Secure` attribute causes curl to store the cookie without its Secure flag. The cookie might then wrongfully be sent over plaintext HTTP on subsequent requests to the same host.

    References: https://ubuntu.com/security/CVE-2026-80255, https://www.cve.org/CVERecord?id=CVE-2026-80255, https://curl.se/docs/CVE-2026-80255.html, https://github.com/curl/curl/commit/4f6aa41a0145e930e76677, https://ubuntu.com/security/notices/USN-8820-1

    Affected packages

    Package

    Name: curl

    Purl: pkg:deb/ubuntu/curl?arch=source&distro=resolute

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -8.18.0-1ubuntu2.7

    Affected versions

    8.14.1-2ubuntu1

    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-2026-80255 | CVE-DB