CVE-2026-87996Public exploitNetwork attack vector

Authenticated internal data disclosure via DNS rebinding

Published Sep 9, 2026 · Updated Sep 10, 2026

SSRF in Open WebUI 0.9.6 through 0.11.0 allows remote authenticated users to read internal HTTP responses via DNS rebinding. SafePlaywrightURLLoader validates a submitted hostname in Python, then lets Playwright resolve it again without binding the connection to the checked address. Exploitation requires the non-default Playwright loader, reachable internal services, an ordinary account, and control of authoritative DNS; disclosed content returns through web search or URL ingestion.

CVSS severity7.7
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Open WebUI 0.9.6 through 0.11.0 allows remote authenticated users to read internal HTTP responses via DNS rebinding. SafePlaywrightURLLoader validates a submitted hostname in Python, then lets Playwright resolve it again without binding the connection to the checked address. Exploitation requires the non-default Playwright loader, reachable internal services, an ordinary account, and control of authoritative DNS; disclosed content returns through web search or URL ingestion.

The record

CVE
CVE-2026-87996
Published
Sep 9, 2026
Updated
Sep 10, 2026
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-367, CWE-918, T1552.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.9.6, < 0.11.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open WebUI · Open WebUIversion=>= 0.9.6, < 0.11.1

Published CVSS scores

7.7GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-918Server-Side Request Forgery (SSRF)
T1552.005Credentials from Cloud Instance Metadata APIs

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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