{"cve":"CVE-2026-70481","nvd":{"published":"2026-08-04T20:16:55.050","modified":"2026-09-18T14:46:06.190","status":"Analyzed","description":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.0, the standard channel message update and delete handlers accepted any caller holding write access on the channel without checking that the caller wrote the message. Because write access is the same grant a member needs to post, any ordinary participant in a shared standard channel could rewrite or permanently delete another participant message, while group and direct message handlers enforced authorship. This issue is fixed in 0.11.0.","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:L/A:L","score":5.4},"cwes":["CWE-284","CWE-862"],"references":["https://github.com/open-webui/open-webui/commit/c609ec41154fa092fa0af80d9d365de06b666286","https://github.com/open-webui/open-webui/pull/27197","https://github.com/open-webui/open-webui/releases/tag/v0.11.0","https://github.com/open-webui/open-webui/security/advisories/GHSA-mj5r-jf49-m3w7"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-70481","score":0.00427,"percentile":0.36968,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-mj5r-jf49-m3w7","url":"https://osv.dev/vulnerability/GHSA-mj5r-jf49-m3w7","summary":"Open WebUI: Any member with write access to a standard channel can edit or delete other members' messages","modified":"2026-08-10T11:40:50.216994888Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.5.0 <0.11.0"],"fixed":["0.11.0"]}]},{"id":"PYSEC-2026-3649","url":"https://osv.dev/vulnerability/PYSEC-2026-3649","summary":"Open WebUI: Any member with write access to a standard channel can edit or delete other members' messages","modified":"2026-08-10T11:30:11.418400500Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.5.0 <0.11.0"],"fixed":["0.11.0"]}]}],"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."]}