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      "category" : "summary",
      "text" : "An update for python-markdown is now available for Red Hat Enterprise Linux 10.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
      "title" : "Topic"
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      "text" : "Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.\n\nSecurity Fix(es):\n\n* python-markdown: denial of service via malformed HTML-like sequences (CVE-2025-69534)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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      "text" : "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
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      "url" : "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_19155.json"
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    "title" : "Red Hat Security Advisory: python-markdown security update",
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      "name" : "Reachable Assertion"
    },
    "discovery_date" : "2026-03-05T16:01:10.432461+00:00",
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2444839"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in Python-Markdown. Parsing crafted markdown content containing malformed HTML-like sequences causes html.parser.HTMLParser to raise an unhandled AssertionError. This unhandled exception allows an attacker to cause an application crash and potentially disclose sensitive information via its stack trace.",
      "title" : "Vulnerability description"
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      "text" : "python-markdown: denial of service via malformed HTML-like sequences",
      "title" : "Vulnerability summary"
    }, {
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      "text" : "To exploit this flaw, an attacker must be able to supply a specially crafted payload to be processed by an application using Python-Markdown. Additionally, the security impact of this vulnerability is limited to an information disclosure via the unhandled exception stack trace and a denial of service. There is no memory corruption or arbitrary command execution. Due to these reasons, this issue has been rated with an important severity.",
      "title" : "Statement"
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      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
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    },
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      "url" : "https://access.redhat.com/security/cve/CVE-2025-69534"
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      "category" : "external",
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      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2444839"
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      "summary" : "https://www.cve.org/CVERecord?id=CVE-2025-69534",
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      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2025-69534",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-69534"
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      "category" : "external",
      "summary" : "https://github.com/Python-Markdown/markdown",
      "url" : "https://github.com/Python-Markdown/markdown"
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      "summary" : "https://github.com/Python-Markdown/markdown/actions/runs/15736122892",
      "url" : "https://github.com/Python-Markdown/markdown/actions/runs/15736122892"
    }, {
      "category" : "external",
      "summary" : "https://github.com/Python-Markdown/markdown/issues/1534",
      "url" : "https://github.com/Python-Markdown/markdown/issues/1534"
    } ],
    "release_date" : "2026-03-05T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-05-19T16:30:36+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "restart_required" : {
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      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:19155"
    }, {
      "category" : "workaround",
      "details" : "To mitigate this vulnerability, wrap your markdown parsing function in a try/except block. This catches the unhandled exception, preventing both the application crash and the stack trace leak.",
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    } ],
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        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 8.2,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "LOW",
        "integrityImpact" : "NONE",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
        "version" : "3.1"
      },
      "products" : [ "BaseOS-10.2.Z:python-markdown-0:3.5.1-6.el10_2.1.src", "BaseOS-10.2.Z:python3-markdown-0:3.5.1-6.el10_2.1.noarch" ]
    } ],
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      "details" : "Important"
    } ],
    "title" : "python-markdown: denial of service via malformed HTML-like sequences"
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}