UBUNTU-CVE-2026-15308

    Dashboard / Vulnerabilities / UBUNTU-CVE-2026-15308

    UBUNTU-CVE-2026-15308

    Published: 9 Jul 2026Last Modified: 10 Sept 2026
    Upstream:
    CVE-2026-15308
    Aliases:
    USN-8744-1

    Summary:

    Details: The incremental HTML parser (html.parser.HTMLParser) allows for CPU denial-of-service through repeated unterminated markup declarations when processing uncontrolled data.

    References: https://ubuntu.com/security/CVE-2026-15308, https://www.cve.org/CVERecord?id=CVE-2026-15308, https://github.com/python/cpython/commit/07efb08123ba9367a7107325adb9d5626dca1ca9, https://github.com/python/cpython/commit/7933f4bf7131aa4140750f9404f5de0aa2969ced, https://github.com/python/cpython/commit/bcf98ddbc40ec9b3ee87da0124a5660b19b7e606, https://github.com/python/cpython/commit/e9f92ac0b298292e7ff998e52cb8ccacfb27a0bd, https://github.com/python/cpython/issues/153030, https://github.com/python/cpython/pull/153031, https://mail.python.org/archives/list/[email protected]/thread/F6453LWKSHKCTWFLCOURWPLETNUIW2Z5/, http://www.openwall.com/lists/oss-security/2026/07/09/4, https://ubuntu.com/security/notices/USN-8744-1

    Affected packages

    Package

    Name: python2.7

    Purl: pkg:deb/ubuntu/python2.7?arch=source&distro=esm-infra-legacy%2Ftrusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.7.6-8ubuntu0.6+esm30

    Affected versions

    2.7.5-8ubuntu3
    2.7.5-8ubuntu4
    2.7.6-2
    2.7.6-2ubuntu1
    2.7.6-3
    2.7.6-3ubuntu1
    2.7.6-4
    2.7.6-4ubuntu1
    2.7.6-5
    2.7.6-7
    2.7.6-8
    2.7.6-8ubuntu0.2
    2.7.6-8ubuntu0.3
    2.7.6-8ubuntu0.4
    2.7.6-8ubuntu0.5
    2.7.6-8ubuntu0.6+esm2
    2.7.6-8ubuntu0.6+esm3
    2.7.6-8ubuntu0.6+esm5
    2.7.6-8ubuntu0.6+esm6
    2.7.6-8ubuntu0.6+esm7
    2.7.6-8ubuntu0.6+esm8
    2.7.6-8ubuntu0.6+esm9
    2.7.6-8ubuntu0.6+esm10
    2.7.6-8ubuntu0.6+esm11
    2.7.6-8ubuntu0.6+esm12
    2.7.6-8ubuntu0.6+esm13
    2.7.6-8ubuntu0.6+esm14
    2.7.6-8ubuntu0.6+esm15
    2.7.6-8ubuntu0.6+esm16
    2.7.6-8ubuntu0.6+esm17
    2.7.6-8ubuntu0.6+esm18
    2.7.6-8ubuntu0.6+esm20
    2.7.6-8ubuntu0.6+esm21
    2.7.6-8ubuntu0.6+esm22
    2.7.6-8ubuntu0.6+esm24
    2.7.6-8ubuntu0.6+esm25
    2.7.6-8ubuntu0.6+esm26
    2.7.6-8ubuntu0.6+esm28
    2.7.6-8ubuntu0.6+esm29

    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-2026-15308 | CVE-DB