CVE-2026-49851

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"modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "lepture", "product": "mistune", "versions": [{"status": "affected", "version": "< 3.3.0"}]}]}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "affectedData": [{"cpes": ["cpe:/a:redhat:openshift_ai:3.4::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift AI 3.4", "versions": [{"status": "unaffected", "version": "1787073866", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9", "collectionURL": 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"affected"}, {"cpes": ["cpe:/a:redhat:migration_toolkit_applications:8"], "vendor": "Red Hat", "product": "Migration Toolkit for Applications 8", "packageName": "mta/mta-solution-server-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:openshift_ai"], "vendor": "Red Hat", "product": "Red Hat OpenShift AI (RHOAI)", "packageName": "rhoai/odh-th06-cpu-torch291-py312-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:openshift_ai"], "vendor": "Red Hat", "product": "Red Hat OpenShift AI (RHOAI)", "packageName": "rhoai/odh-th06-cuda130-torch291-py312-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:openshift_ai"], "vendor": "Red Hat", "product": "Red Hat OpenShift AI (RHOAI)", "packageName": "rhoai/odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "packageName": "python-mistune", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:satellite:6"], "vendor": "Red Hat", "product": "Red Hat Satellite 6", "packageName": "satellite/iop-advisor-engine-rhel9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}]}], "published": "2026-06-24T18:17:18.937", "references": [{"url": "https://github.com/lepture/mistune/security/advisories/GHSA-qcq2-496w-v96p", "source": "security-advisories@github.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:60520", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-49851", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492304", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://github.com/lepture/mistune/security/advisories/GHSA-qcq2-496w-v96p", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}, {"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49851.json", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-407"}, {"lang": "en", "value": "CWE-770"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-1333"}]}], "descriptions": [{"lang": "en", "value": "Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, Mistune is vulnerable to a CPU exhaustion DoS due to superlinear (approximately O(n\u00b2)) behavior in parse_link_text. When parsing Markdown containing many consecutive [ characters, parse_link_text repeatedly scans the input using a regex search inside a loop. Each iteration re-scans a large portion of the remaining string, resulting in quadratic-time behavior. An attacker-controlled Markdown input can therefore trigger excessive CPU usage with a very small payload. This vulnerability is fixed in 3.3.0."}, {"lang": "es", "value": "Mistune es un analizador de Markdown para Python con renderizadores y complementos. Antes de la 3.3.0, Mistune es vulnerable a un DoS por agotamiento de CPU debido a un comportamiento superlineal (aproximadamente O(n\u00b2)) en parse_link_text. Al analizar Markdown que contiene muchos caracteres [ consecutivos, parse_link_text escanea repetidamente la entrada utilizando una b\u00fasqueda de expresiones regulares dentro de un bucle. Cada iteraci\u00f3n vuelve a escanear una gran parte de la cadena restante, lo que resulta en un comportamiento de tiempo cuadr\u00e1tico. Una entrada de Markdown controlada por un atacante puede, por lo tanto, desencadenar un uso excesivo de la CPU con una carga \u00fatil muy peque\u00f1a. Esta vulnerabilidad se corrigi\u00f3 en la 3.3.0."}], "lastModified": "2026-10-25T22:10:00.150", "sourceIdentifier": "security-advisories@github.com"}