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Highest advisory severityMedium 1 vendor · 1 advisory

CVE-2026-59922

CVE-2026-59922: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Red Hat

1 advisory
  • Advisory severityMedium6.5

    Medium [CVE-2026-59922] Denial of Service via crafted input

    CVE-2026-59922Source published Source updated

    Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a run of closed tilde, equals-sign, or caret marker pairs around a character causes quadratic work in src/mistune/plugins/formatting.py when the strikethrough, mark, or insert plugin scans for matching markers from each possible start position, allowing denial of service through CPU exhaustion. This issue is fixed in version 3.3.0. A remote attacker could exploit this vulnerability by providing specially crafted input containing specific marker pairs (tilde, equals-sign, or caret). This crafted input causes the parser to perform quadratic work, leading to excessive CPU consumption. This can result in a denial of service (DoS) for the affected system. This Moderate flaw in the Mistune Python Markdown parser…

    Affected products in this advisory
    • Migration Toolkit for Applications 8
    • Red Hat OpenShift AI (RHOAI)
    • Red Hat OpenShift Container Platform 4
    Source-reported affected versions
    • < 3.3.0
    Source-reported fixed versions
    • 3.3.0
    Mitigation guidance
    • To mitigate this vulnerability, disable the `strikethrough`, `mark`, and `insert` plugins if they are not essential for your application's functionality. These plugins are not enabled by default in Mistune. Consult your application's documentation for specific instructions on how to configure or disable Mistune plugins. If the application does not explicitly enable these plugins, no further action is required.
    Full advisory and evidenceOpen source bulletin

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