{"id":"CVE-2024-7983","aliases":["EUVD-2025-6928","GHSA-5v9m-57mq-qc75","MGASA-2024-0321","PYSEC-2026-1723"],"status":"published","title":"Denial of Service in open-webui/open-webui","description":"In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00878,"percentile":0.59472,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400","CWE-770"],"published":"2024-10-04T05:27:04Z","modified":"2026-10-28T02:30:30Z","fixes":[{"ecosystem":"PyPI","package":"open-webui","fixed_in":["0.5.13"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"open-webui","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.3.8"}]}]},{"source":"osv","ecosystem":"PyPI","package":"open-webui","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.3.8"}]}],"versions":["0.1.124","0.1.125","0.2.0","0.2.1","0.2.2","0.2.3","0.2.4","0.2.5","0.3.0","0.3.1","0.3.2","0.3.3","0.3.4","0.3.5","0.3.6","0.3.7","0.3.8"]},{"source":"osv","ecosystem":"Mageia:9","package":"chromium-browser-stable","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"128.0.6613.137-1.mga9.tainted"}]}],"bundled":62},{"source":"osv","ecosystem":"PyPI","package":"open-webui","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.13"}]}],"versions":["0.1.124","0.1.125","0.2.0","0.2.1","0.2.2","0.2.3","0.2.4","0.2.5","0.3.0","0.3.1","0.3.10","0.3.12","0.3.13","0.3.14","0.3.15","0.3.16","0.3.17","0.3.17.dev2","0.3.17.dev3","0.3.17.dev4","0.3.17.dev5","0.3.18","0.3.19","0.3.2","0.3.20","0.3.21","0.3.22","0.3.23","0.3.24","0.3.25","0.3.26","0.3.27","0.3.27.dev1","0.3.27.dev2","0.3.27.dev3","0.3.28","0.3.29","0.3.3","0.3.30","0.3.30.dev1","0.3.30.dev2","0.3.31","0.3.31.dev1","0.3.32","0.3.33","0.3.33.dev1","0.3.34","0.3.35","0.3.4","0.3.5","0.3.6","0.3.7","0.3.8","0.3.9","0.4.0","0.4.0.dev1","0.4.0.dev2","0.4.1","0.4.2","0.4.3","0.4.4","0.4.5","0.4.6","0.4.6.dev1","0.4.7","0.4.8","0.5.0","0.5.0.dev1","0.5.0.dev2","0.5.1","0.5.10","0.5.11","0.5.12","0.5.2","0.5.3","0.5.3.dev1","0.5.4","0.5.5","0.5.6","0.5.7","0.5.8","0.5.9"]}],"products":[{"vendor":"open-webui","product":"open-webui/open-webui"},{"vendor":"openwebui","product":"open_webui"}],"references":[{"url":"https://huntr.com/bounties/f8156ca5-1328-480f-a72b-8d3dfdad87dc","tags":["Exploit","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-7983","tags":["advisory"]},{"url":"https://github.com/open-webui/open-webui/blob/eff736acd2e0bbbdd0eeca4cc209b216a1f23b6a/backend/apps/webui/routers/utils.py#L49","tags":["web"]},{"url":"https://github.com/advisories/GHSA-5v9m-57mq-qc75","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/7xxx/CVE-2024-7983.json","tags":["advisory"]},{"url":"https://github.com/open-webui/open-webui","tags":["package"]},{"url":"https://advisories.mageia.org/MGASA-2024-0321.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=33443","tags":["report"]},{"url":"https://chromereleases.googleblog.com/2024/09/stable-channel-update-for-desktop_24.html","tags":["web"]},{"url":"https://chromereleases.googleblog.com/2024/09/stable-channel-update-for-desktop_17.html","tags":["web"]},{"url":"https://chromereleases.googleblog.com/2024/09/stable-channel-update-for-desktop_10.html","tags":["web"]},{"url":"https://chromereleases.googleblog.com/2024/09/stable-channel-update-for-desktop.html","tags":["web"]},{"url":"https://chromereleases.googleblog.com/2024/08/stable-channel-update-for-desktop_28.html","tags":["web"]},{"url":"https://chromereleases.googleblog.com/2024/08/stable-channel-update-for-desktop_21.html","tags":["web"]},{"url":"https://chromereleases.googleblog.com/2024/08/stable-channel-update-for-desktop_13.html","tags":["web"]},{"url":"https://chromereleases.googleblog.com/2024/08/stable-channel-update-for-desktop.html","tags":["web"]},{"url":"https://chromereleases.googleblog.com/2024/07/stable-channel-update-for-desktop_30.html","tags":["web"]},{"url":"https://chromereleases.googleblog.com/2024/07/stable-channel-update-for-desktop_23.html","tags":["web"]},{"url":"https://pypi.org/project/open-webui","tags":["package"]},{"url":"https://github.com/open-webui/open-webui/commit/2f75eef499cc5cb48deb639cebebf86c405640bd","tags":["fix"]}],"sources":{"cve":[{"id":"CVE-2024-7983","title":"Denial of Service in open-webui/open-webui","description":"In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.","status":"published","published":"2025-03-20T10:10:35.664Z","modified":"2025-10-15T12:49:52.82Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:34:21.025267Z"}],"euvd":[{"id":"EUVD-2025-6928","description":"In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.","status":"published","published":"2025-03-20T10:10:35Z","modified":"2025-10-15T12:49:52Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:31:32.071816Z"}],"ghsa":[{"id":"GHSA-5v9m-57mq-qc75","title":"Open WebUI denial of service through endpoint for converting markdown","description":"In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.","status":"published","published":"2025-03-20T12:32:47Z","modified":"2025-10-15T16:07:44Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-770"],"updated_at":"2026-11-02T14:39:01.677422Z"}],"nvd":[{"id":"CVE-2024-7983","description":"In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.","status":"published","published":"2025-03-20T10:15:38.387Z","modified":"2026-06-17T08:21:36.823Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:10:45.815983Z"}],"osv":[{"id":"CVE-2024-7983","title":"Denial of Service in open-webui/open-webui","description":"In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.","status":"published","published":"2025-03-20T10:10:35.664Z","modified":"2026-10-28T02:30:30.528867306Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:44:45.405014Z"},{"id":"GHSA-5v9m-57mq-qc75","title":"Open WebUI denial of service through endpoint for converting markdown","description":"In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.","status":"published","published":"2025-03-20T12:32:47Z","modified":"2026-07-07T17:56:59.163843534Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-770"],"updated_at":"2026-11-02T15:46:38.911014Z"},{"id":"PYSEC-2026-1723","title":"Open WebUI denial of service through endpoint for converting markdown","description":"In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.","status":"published","published":"2026-07-07T14:34:56.331499Z","modified":"2026-07-23T11:45:10.989508515Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:55.06457Z"},{"id":"MGASA-2024-0321","title":"Updated chromium-browser-stable packages fix security vulnerabilities","description":"Use after free in Downloads. (CVE-2024-6988)\nUse after free in Loader. (CVE-2024-6989)\nUse after free in Dawn. (CVE-2024-6991)\nHeap buffer overflow in Layout. (CVE-2024-6994)\nInappropriate implementation in Fullscreen. (CVE-2024-6995)\nRace in Frames. (CVE-2024-6996)\nUse after free in Tabs. (CVE-2024-6997)\nUse after free in User Education. (CVE-2024-6998)\nInappropriate implementation in FedCM. (CVE-2024-6999)\nUse after free in CSS. (CVE-2024-7000)\nInappropriate implementation in HTML. (CVE-2024-7001)\nInappropriate implementation in FedCM. (CVE-2024-7003)\nInsufficient validation of untrusted input in Safe Browsing.\n(CVE-2024-7004)\nInsufficient validation of untrusted input in Safe Browsing.\n(CVE-2024-7005)\nUninitialized Use in Dawn. (CVE-2024-6990)\nOut of bounds read in WebTransport. (CVE-2024-7255)\nInsufficient data validation in Dawn. (CVE-2024-7256)\nOut of bounds memory access in ANGLE. (CVE-2024-7532)\nUse after free in Sharing. (CVE-2024-7533)\nType Confusion in V8. (CVE-2024-7550)\nHeap buffer overflow in Layout. (CVE-2024-7534)\nInappropriate implementation in V8. (CVE-2024-7535)\nUse after free in WebAudio. (CVE-2024-7536)\nUse after free in Passwords. (CVE-2024-7964)\nInappropriate implementation in V8. (CVE-2024-7965)\nOut of bounds memory access in Skia. (CVE-2024-7966)\nHeap buffer overflow in Fonts. (CVE-2024-7967)\nUse after free in Autofill. (CVE-2024-7968)\nType confusion in V8. (CVE-2024-7971)\nInappropriate implementation in V8. (CVE-2024-7972)\nHeap buffer overflow in PDFium. (CVE-2024-7973)\nInsufficient data validation in V8 API. (CVE-2024-7974)\nInappropriate implementation in Permissions. (CVE-2024-7975)\nInappropriate implementation in FedCM. (CVE-2024-7976)\nInsufficient data validation in Installer. (CVE-2024-7977)\nInsufficient policy enforcement in Data Transfer. (CVE-2024-7978)\nInsufficient data validation in Installer. (CVE-2024-7979)\nInsufficient data validation in Installer. (CVE-2024-7980)\nInappropriate implementation in Views. (CVE-2024-7981)\nType Confusion in V8. (CVE-2024-7969)\nHeap buffer overflow in Skia. (CVE-2024-8193)\nType Confusion in V8. (CVE-2024-8194)\nHeap buffer overflow in Skia. (CVE-2024-8198)\nUse after free in WebAudio. (CVE-2024-8362)\nOut of bounds write in V8. (CVE-2024-7970)\nHeap buffer overflow in Skia. (CVE-2024-8636)\nUse after free in Media Router. (CVE-2024-8637)\nType Confusion in V8. (CVE-2024-8638)\nUse after free in Autofill. (CVE-2024-8639)\nType Confusion in V8. (CVE-2024-8904)\nInappropriate implementation in V8. (CVE-2024-8905)\nIncorrect security UI in Downloads. (CVE-2024-8906)\nInsufficient data validation in Omnibox. (CVE-2024-8907)\nInappropriate implementation in Autofill. (CVE-2024-8908)\nInappropriate implementation in UI. (CVE-2024-8909)\nInappropriate implementation in V8. (CVE-2024-9121)\nType Confusion in V8. (CVE-2024-9122)\nInteger overflow in Skia. (CVE-2024-9123)\n","status":"published","published":"2024-10-04T05:27:04Z","modified":"2026-04-16T04:44:07.052112124Z","updated_at":"2026-11-02T15:49:42.684501Z"}]}}