{"id":"CVE-2020-26409","aliases":["BIT-gitlab-2020-26409","EUVD-2020-18956","GHSA-3jr7-57xj-6hhm","UBUNTU-CVE-2020-26409"],"status":"published","title":"A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that...","description":"A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0126,"percentile":0.69806,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-400"],"published":"2020-12-11T01:17:28Z","modified":"2026-10-30T10:30:17Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["13.6.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"13.6.2"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gitlab","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.3+dfsg-9","8.4.3+dfsg-12","8.5.8+dfsg-5"]}],"products":[{"vendor":"gitlab","product":"gitlab"},{"vendor":"gitlab","product":"gitlab ce/ee"}],"references":[{"url":"https://gitlab.com/gitlab-org/gitlab/-/issues/259626","tags":["x_refsource_MISC","x_transferred","Broken Link","web","report"]},{"url":"https://hackerone.com/reports/990461","tags":["x_refsource_MISC","x_transferred","Permissions Required","web","report"]},{"url":"https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26409.json","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26409","tags":["web"]},{"url":"https://github.com/advisories/GHSA-3jr7-57xj-6hhm"},{"url":"https://ubuntu.com/security/CVE-2020-26409","tags":["report"]},{"url":"https://about.gitlab.com/releases/2020/12/07/security-release-gitlab-13-6-2-released/","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-26409","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-26409","description":"A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.","status":"published","published":"2020-12-11T01:17:28Z","modified":"2024-08-04T15:56:04.626Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:35:45.763329Z"}],"euvd":[{"id":"EUVD-2020-18956","description":"A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.","status":"published","published":"2020-12-11T01:17:28Z","modified":"2024-08-04T15:56:04Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-03T03:07:15.15938Z"}],"ghsa":[{"id":"GHSA-3jr7-57xj-6hhm","title":"A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that...","description":"A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.","status":"published","published":"2022-05-24T17:36:02Z","modified":"2023-01-29T05:04:40Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:45:36.996717Z"}],"nvd":[{"id":"CVE-2020-26409","description":"A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.","status":"published","published":"2020-12-11T02:15:11.49Z","modified":"2026-06-17T03:08:05.143Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20","CWE-400"],"updated_at":"2026-11-02T14:06:27.10541Z"}],"osv":[{"id":"CVE-2020-26409","description":"A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.","status":"published","published":"2020-12-11T02:15:11.49Z","modified":"2026-10-30T10:30:17.473697029Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:16.248747Z"},{"id":"UBUNTU-CVE-2020-26409","description":"A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.","status":"published","published":"2020-12-11T02:15:00Z","modified":"2025-10-24T04:48:47Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:54:23.905183Z"},{"id":"BIT-gitlab-2020-26409","description":"A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.","status":"published","published":"2024-03-06T11:21:17.046Z","modified":"2026-09-10T16:01:32.425057094Z","updated_at":"2026-11-02T15:28:29.999658Z"}]}}