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CVE-2026-70482

8.1 HIGHPublic exploitEPSS 0.34%
  1. Published4 Aug 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected products

Openwebui Open Webui≥ 0.8.0 < 0.11.0

Remediation

Fixed in
Openwebui Open Webui≥ 0.11.0

References

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Frequently asked

Is CVE-2026-70482 being actively exploited?

CVE-2026-70482 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.34%.

How severe is CVE-2026-70482?

CVE-2026-70482 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.34% probability of exploitation.

Which products are affected by CVE-2026-70482?

Affected products include Openwebui Open Webui.

How do I fix CVE-2026-70482?

Upgrade affected software to a fixed version, for example Openwebui Open Webui 0.11.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-70482 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.