UBUNTU-CVE-2026-61847

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    UBUNTU-CVE-2026-61847

    Published: 30 Oct 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-61847

    Summary:

    Details: Crass is a Ruby CSS parser that's fully compliant with the CSS Syntax Level 3 specification. Prior to 1.0.7, when the `:preserve_comments` option is not enabled, which is the default, Crass discards CSS comments by recursively consuming the next token. An attacker-provided stylesheet containing a very large number of adjacent comments can cause excessive recursion and trigger a `SystemStackError`, denying service to the parsing application. Preserving comments avoids this recursive path. This issue is fixed in version 1.0.7.

    References: https://ubuntu.com/security/CVE-2026-61847, https://www.cve.org/CVERecord?id=CVE-2026-61847, https://github.com/rgrove/crass/security/advisories/GHSA-wwpr-jff3-395c, https://github.com/rgrove/crass/commit/25d78cc607c54262e9d43ea1930f3ba5bb03dfb5, https://github.com/rgrove/crass/commit/25d78cc607c54262e9d43ea1930f3ba5bb03dfb5, https://github.com/rgrove/crass/releases/tag/v1.0.7

    Affected packages

    Package

    Name: ruby-crass

    Purl: pkg:deb/ubuntu/ruby-crass?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.0.2-2

    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-2026-61847 | CVE-DB