{"cve":"CVE-2026-54015","nvd":{"published":"2026-06-23T18:18:06.830","modified":"2026-06-25T14:35:30.810","status":"Analyzed","description":"Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI's prompt version-history endpoints authorize the prompt_id in the URL but then act on caller-supplied history IDs without verifying that the history row belongs to that prompt (history_entry.prompt_id == prompt.id). This affects /api/v1/prompts/id/{prompt_id}/history/diff, /api/v1/prompts/id/{prompt_id}/update/version, and /api/v1/prompts/id/{prompt_id}/history/{history_id}. An authenticated user with access to any prompt they control, plus a victim prompt_history.id, can read or delete another user's private prompt history. This vulnerability is fixed in 0.9.6.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L","score":6.4},"cwes":["CWE-284","CWE-639"],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-4r4w-2wgp-w7cj","https://github.com/open-webui/open-webui/security/advisories/GHSA-4r4w-2wgp-w7cj"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:41:17.107060303+00:00"},"epss":{"cve":"CVE-2026-54015","score":0.00269,"percentile":0.19132,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4r4w-2wgp-w7cj","url":"https://osv.dev/vulnerability/GHSA-4r4w-2wgp-w7cj","summary":"Open WebUI Prompt history IDOR: unbound history_id allows cross-prompt read and deletion","modified":"2026-07-20T21:15:26.084072415Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.9.6"],"fixed":["0.9.6"]}]},{"id":"PYSEC-2026-2701","url":"https://osv.dev/vulnerability/PYSEC-2026-2701","summary":"Open WebUI Prompt history IDOR: unbound history_id allows cross-prompt read and deletion","modified":"2026-07-13T16:31:52.602071988Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.9.6"],"fixed":["0.9.6"]}]}],"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."]}