CVE-2026-70482: open-webui · Improper Authentication
Affects open-webuiSource CVE Database V5
Not known to be exploited · CVSS 8.1 High : upgrade to 0.11.0 soon.
Data as of 3 Nov 2026, 22:58 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 8.1 |
|---|
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Total control over the software or total information disclosure
CISA SSVC assessment, 2026-08-06.
- Patch
- Available – fixed in 0.11.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 4 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.
What to do
Upgrade open-webui to 0.11.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| open-webuiopen-webui | Affected
| Fixed in
|
Description
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.
References
- github.com/open-webui/open-webui/security/advisories/GHSA-rq84-p6rr-vf89 (opens in a new tab)
- github.com/open-webui/open-webui/commit/b190dcf3caa00dc8b7b9c7312828298d9143f60d (opens in a new tab)
- github.com/open-webui/open-webui/commit/c4332be71e6e9c314e8a13b9d2819a6932561630 (opens in a new tab)
- github.com/open-webui/open-webui/releases/tag/v0.11.0 (opens in a new tab)