{"cve":"CVE-2026-59927","nvd":{"published":"2026-07-08T17:17:28.450","modified":"2026-10-25T17:10:00.197","status":"Analyzed","description":"Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the Include directive in src/mistune/directives/include.py detects only direct self-includes and not indirect cycles, allowing two markdown files that include each other to trigger unbounded recursion, raise RecursionError, and crash the rendering request. This issue is fixed in version 3.3.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":["CWE-674","CWE-755"],"references":["https://github.com/lepture/mistune/commit/1bef343ade163fc3bb95572b15be720084cdb993","https://github.com/lepture/mistune/releases/tag/v3.3.0","https://github.com/lepture/mistune/security/advisories/GHSA-8mpj-m6qm-5qr8"],"products":["mistune_project:mistune"],"source":"nvd","synced_at":"2026-10-25T17:50:06.907763985+00:00"},"epss":{"cve":"CVE-2026-59927","score":0.00529,"percentile":0.44468,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-8mpj-m6qm-5qr8","url":"https://osv.dev/vulnerability/GHSA-8mpj-m6qm-5qr8","summary":"Mistune directives/include: mutual `.. include::` recursion crashes the renderer with `RecursionError`, denial of service via two attacker-controlled markdown files","modified":"2026-07-20T21:30:45.969881443Z","packages":[{"ecosystem":"PyPI","name":"mistune","purl":"pkg:pypi/mistune","ranges":["<3.3.0"],"fixed":["3.3.0"]}]},{"id":"PYSEC-2026-2215","url":"https://osv.dev/vulnerability/PYSEC-2026-2215","summary":"","modified":"2026-07-13T07:15:18.817354531Z","packages":[{"ecosystem":"PyPI","name":"mistune","purl":"pkg:pypi/mistune","ranges":["<3.3.0"],"fixed":["3.3.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}