CVE-2026-71488

{"id": "CVE-2026-71488", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-71488", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-07T17:16:54.394661Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "thephpleague", "product": "commonmark", "versions": [{"status": "affected", "version": ">= 0.6.0, < 2.9.0"}]}]}], "published": "2026-08-06T22:18:31.893", "references": [{"url": "https://github.com/thephpleague/commonmark/commit/a6ef6cdc308dfa39a34239c35818e75892a0e6a8", "source": "security-advisories@github.com"}, {"url": "https://github.com/thephpleague/commonmark/commit/a70979ea0d7d3377bd7127536748454a922bf5eb", "source": "security-advisories@github.com"}, {"url": "https://github.com/thephpleague/commonmark/commit/c97b02e5e652b992033b93ba5d6182f706343fc6", "source": "security-advisories@github.com"}, {"url": "https://github.com/thephpleague/commonmark/releases/tag/2.9.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/thephpleague/commonmark/security/advisories/GHSA-2q4p-g7hv-5rgv", "source": "security-advisories@github.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-407"}, {"lang": "en", "value": "CWE-1050"}]}], "descriptions": [{"lang": "en", "value": "league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 0.6.0 until 2.9.0, specially crafted Markdown lines can cause the parser to have quadratic time complexity when converting, because several parsing paths repeatedly rescan growing portions of a line to translate between character positions and byte positions, and the Autolink extension can also copy and validate the remaining line at every URL-like prefix, allowing an attacker who can submit Markdown for conversion to consume disproportionate CPU time with a comparatively small request. This issue is fixed in 2.9.0."}, {"lang": "es", "value": "league/commonmark es una biblioteca PHP para analizar y renderizar CommonMark Markdown. Desde la versi\u00f3n 0.6.0 hasta la 2.9.0, l\u00edneas Markdown especialmente dise\u00f1adas pueden hacer que el analizador tenga una complejidad de tiempo cuadr\u00e1tica al convertir, porque varias rutas de an\u00e1lisis vuelven a escanear repetidamente porciones crecientes de una l\u00ednea para traducir entre posiciones de caracteres y posiciones de bytes, y la extensi\u00f3n Autolink tambi\u00e9n puede copiar y validar la l\u00ednea restante en cada prefijo similar a una URL, permitiendo a un atacante que puede enviar Markdown para su conversi\u00f3n consumir un tiempo de CPU desproporcionado con una solicitud comparativamente peque\u00f1a. Este problema se ha solucionado en la versi\u00f3n 2.9.0."}], "lastModified": "2026-10-24T15:10:00.190", "sourceIdentifier": "security-advisories@github.com"}