CVE-2026-70482

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 73% 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 0.8.0 until 0.11.0, when ENABLE_OAUTH_TOKEN_EXCHANGE=True, /oauth/{provider}/token/exchange accepts a raw provider access token and validates it by calling the provider userinfo endpoint without confirming which OAuth client the token was issued to. Anyone holding an access token minted for any client registered with the same provider could exchange it for an Open WebUI session as that token user, including applications the operator does not control and has never authorized. 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
27%
KEV
Not listed

Published

August 4, 2026

Last Modified

August 6, 2026

Advisory Details (4)

Auto-updated Aug 4, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
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_commit

commit c4332be71e6e (open-webui/open-webui)

Fix landed in open-webui/open-webui commit c4332be71e6e — awaiting tagged release

https://github.com/open-webui/open-webui/commit/c4332be71e6e9c314e8a13b9d2819a6932561630
github_commit

commit b190dcf3caa0 (open-webui/open-webui)

Fix landed in open-webui/open-webui commit b190dcf3caa0 — awaiting tagged release

https://github.com/open-webui/open-webui/commit/b190dcf3caa00dc8b7b9c7312828298d9143f60d
github Patch Available🟡 PoC Available

Account takeover via OAuth token exchange accepting tokens issued to any client · Advisory · open-webui/open-webui · GitHub

Affected: 0.11.0. The endpoint now resolves which OAuth client a presented token was issued

https://github.com/open-webui/open-webui/security/advisories/GHSA-rq84-p6rr-vf89

Vendor Advisories for CVE-2026-70482(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 ... 0.9.6 (23 versions)0.11.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 40× 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 05:18 UTCEG score recompute
  2. 2026-08-20 22:56 UTCEPSS rescore
  3. 2026-08-19 18:55 UTCEG score recompute
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-18 18:16 UTCEG score recompute
  6. 2026-08-18 13:49 UTCEPSS rescore
  7. 2026-08-18 13:49 UTCEPSS rescore
  8. 2026-08-17 17:14 UTCEG score recompute
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-16 17:40 UTCEG score recompute
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 06:11 UTCEG score recompute
  14. 2026-08-16 02:15 UTCEPSS rescore
  15. 2026-08-15 07:15 UTCEG score recompute
  16. 2026-08-15 01:31 UTCEPSS rescore
  17. 2026-08-14 08:19 UTCEG score recompute
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-12 21:55 UTCEG score recompute
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-11 23:00 UTCEG score recompute
  22. 2026-08-11 00:04 UTCEG score recompute
  23. 2026-08-11 00:00 UTCEPSS rescore
  24. 2026-08-10 01:08 UTCEG score recompute
  25. 2026-08-09 13:47 UTCEPSS rescore
Show 15 more
  1. 2026-08-09 02:13 UTCEG score recompute
  2. 2026-08-08 16:37 UTCEPSS rescore
  3. 2026-08-08 03:17 UTCEG score recompute
  4. 2026-08-06 16:53 UTCEG score recompute
  5. 2026-08-06 13:47 UTCEPSS rescore
  6. 2026-08-06 05:25 UTCEG score recompute
  7. 2026-08-06 04:25 UTCEG score recompute
  8. 2026-08-06 02:57 UTCEG score recompute
  9. 2026-08-05 19:17 UTCEPSS rescore
  10. 2026-08-05 19:17 UTCEPSS rescore
  11. 2026-08-05 15:29 UTCEG score recompute
  12. 2026-08-05 14:38 UTCEG score recompute
  13. 2026-08-04 20:32 UTCEG score recompute
  14. 2026-08-04 20:06 UTCEG score recompute
  15. 2026-08-04 20:06 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-70482?
CVE-2026-70482 is a high vulnerability published on August 4, 2026. Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.0, when ENABLEOAUTHTOKEN_EXCHANGE=True, /oauth/{provider}/token/exchange accepts a raw provider access token and validates it by calling the provider userinfo endpoint without confirming…
When was CVE-2026-70482 disclosed?
CVE-2026-70482 was first published in the National Vulnerability Database on August 4, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70482 actively exploited?
CVE-2026-70482 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 73.1% of all scored CVEs.
What is the CVSS score of CVE-2026-70482?
CVE-2026-70482 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-70482?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70482, 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

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