{"cve":"CVE-2020-26409","nvd":{"published":"2020-12-11T02:15:11.490","modified":"2026-06-17T03:08:05.143","status":"Modified","description":"A DOS vulnerability exists in Gitlab CE/EE >=10.3, <13.4.7,>=13.5, <13.5.5,>=13.6, <13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-20","CWE-400"],"references":["https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26409.json","https://gitlab.com/gitlab-org/gitlab/-/issues/259626","https://hackerone.com/reports/990461","https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26409.json","https://gitlab.com/gitlab-org/gitlab/-/issues/259626"],"products":["gitlab:gitlab"],"source":"nvd","synced_at":"2026-10-19T21:12:09.559580076+00:00"},"epss":{"cve":"CVE-2020-26409","score":0.0126,"percentile":0.69607,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}