CVE-2026-70479

Open WebUI: SSRF into internal services via unvalidated sub-resource requests in the Playwright web loader

HIGH
7.7
CVSS Score
Published: August 4, 2026 at 07:40 PM UTC
Updated: September 18, 2026 at 02:59 PM UTC
1 product affected across 1 vendorOpen Webui

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Severity
HIGH7.7
Exploit prediction
EPSS 0.5%
SSVC
PoC

Description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, with WEB_LOADER_ENGINE=playwright, the Playwright web loader validates only the top-level page request and lets sub-resource requests pass unvalidated. A page supplied by an authenticated user can use JavaScript to reach blocked internal addresses, and returned DOM can include data read from those addresses in web-search or RAG output. This issue is fixed in 0.11.0.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.11.00.9.6 ≤ v < 0.11.0
Affected range stops below 0.11.0, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/open-webui/open-webui/security/advisories/GHSA-w2rx-84hp-gg95
x_refsource_MISCPatchVendor Advisory
Source: cverecord
https://github.com/open-webui/open-webui/pull/27526
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/open-webui/open-webui/releases/tag/v0.11.0

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.7HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-918

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