CVE-2026-70494

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 78% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.0, the DELETE /api/v1/folders/{id} handler in backend/open_webui/routers/folders.py allowed a user granted write access to a shared chat folder to permanently delete chats and messages belonging to the folder owner. The cascade following the authorization check is bound to the folder owner's id, but the subfolder check accepted any inherited write grant instead of requiring ownership or administrator status. A collaborator can destroy the owner's subtree or force-move chats out of it when delete_contents=false. This issue is fixed in 0.11.0.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

August 4, 2026

Last Modified

August 5, 2026

Advisory Details (4)

Auto-updated Aug 4, 2026
Patch available. Sources: github_pr, github_release, github, github_commit.
github Patch Available

A folder write-collaborator can permanently delete the owner's chats by deleting a shared subfolder · Advisory · open-webui/open-webui · GitHub

Affected: 0.11.0 by

https://github.com/open-webui/open-webui/security/advisories/GHSA-3cg5-48j3-v4gv
github_release Patch Available

v0.11.0

Patch available: open-webui/open-webui v0.11.0

https://github.com/open-webui/open-webui/releases/tag/v0.11.0
github_pr

fix: restrict folder deletion to the owner or an admin

Fix merged in open-webui/open-webui PR #27003 on 2026-07-27 — awaiting tagged release

https://github.com/open-webui/open-webui/pull/27003
github_commit

commit 915ef7d0798d (open-webui/open-webui)

Fix landed in open-webui/open-webui commit 915ef7d0798d — awaiting tagged release

https://github.com/open-webui/open-webui/commit/915ef7d0798d3175819cedbb2f62d7bf0db78c98

Vendor Advisories for CVE-2026-70494(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
open-webui0.10.0, 0.10.1, 0.10.20.11.0—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 08:12 UTCEG score recompute
  2. 2026-08-20 22:56 UTCEPSS rescore
  3. 2026-08-19 19:58 UTCEG score recompute
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-18 19:49 UTCEG score recompute
  6. 2026-08-18 13:49 UTCEPSS rescore
  7. 2026-08-18 13:49 UTCEPSS rescore
  8. 2026-08-17 19:33 UTCEG score recompute
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-16 17:09 UTCEG score recompute
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 05:05 UTCEG score recompute
  14. 2026-08-16 02:15 UTCEPSS rescore
  15. 2026-08-15 04:57 UTCEG score recompute
  16. 2026-08-15 01:31 UTCEPSS rescore
  17. 2026-08-14 04:45 UTCEG score recompute
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-12 16:32 UTCEG score recompute
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-11 16:20 UTCEG score recompute
  22. 2026-08-11 04:16 UTCEG score recompute
  23. 2026-08-11 00:00 UTCEPSS rescore
  24. 2026-08-09 16:03 UTCEG score recompute
  25. 2026-08-09 13:47 UTCEPSS rescore
Show 10 more
  1. 2026-08-08 03:50 UTCEG score recompute
  2. 2026-08-06 15:38 UTCEG score recompute
  3. 2026-08-06 13:47 UTCEPSS rescore
  4. 2026-08-06 03:33 UTCEG score recompute
  5. 2026-08-05 19:17 UTCEPSS rescore
  6. 2026-08-05 19:17 UTCEPSS rescore
  7. 2026-08-05 15:29 UTCEG score recompute
  8. 2026-08-05 14:37 UTCEG score recompute
  9. 2026-08-04 21:31 UTCEG score recompute
  10. 2026-08-04 21:08 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-70494?
CVE-2026-70494 is a high vulnerability published on August 4, 2026. Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.0, the DELETE /api/v1/folders/{id} handler in backend/openwebui/routers/folders.py allowed a user granted write access to a shared chat folder to permanently delete chats and messages…
When was CVE-2026-70494 disclosed?
CVE-2026-70494 was first published in the National Vulnerability Database on August 4, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70494 actively exploited?
CVE-2026-70494 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 77.6% of all scored CVEs.
What is the CVSS score of CVE-2026-70494?
CVE-2026-70494 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-70494?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70494, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-70494

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