Open WebUI: Redirect-Bypass SSRF in OAuth _process_picture_url (incomplete-fix sibling of CVE-2026-45401)

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

EPSS

• CVE-2026-54008: 0.33% estimated exploitation activity in the next 30 days; percentile 25.71 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary backend/openwebui/utils/oauth.py::processpictureurl (v0.9.5, lines 1435-1470) calls validateurl(pictureurl) on the initial URL only, then invokes aiohttp.ClientSession.get(pictureurl, ...) without allowredirects=False. aiohttp's default is allowredirects=True, maxredirects=10; the function does not pass the project's AIOHTTPCLIENTALLOWREDIRECTS env constant either. An attacker with a valid OAuth IdP identity can therefore submit a public URL that 302-redirects to an internal address and read the internal response body via the attacker's own profileimageurl field. This is the same redirect-bypass class as CVE-2026-45401 (GHSA-rh5x-h6pp-cjj6), on a 6th call site that the v0.9.5 patch missed. CVE-2026-45401's advisory body enumerates exactly five affected paths — SafeWebBaseLoader.scrape, fetch, getcontentfromurl, loadurlimage, getimagebase64fromurl — none in utils/oauth.py. Vulnerable code (v0.9.5) backend/openwebui/utils/oauth.py, lines 1435-1470: The function is invoked…

Published by the source

17 Jun 2026, 14:10 UTC

Last modified by the source

13 Jul 2026, 16:42 UTC

Source last checked

26 Oct 2026, 13:45 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-226f-f24g-524w

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-226f-f24g-524w

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# Patch Next advisory brief: CVE-2026-54008

Advisory: Open WebUI: Redirect-Bypass SSRF in OAuth `_process_picture_url` (incomplete-fix sibling of CVE-2026-45401)
IDs: CVE-2026-54008, GHSA-226f-f24g-524w
Record: https://patchnext.com/advisories/cve-2026-54008 (revision 2, source checked 26 Oct 2026, 13:45 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: open-webui 0.9.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI open-webui: affected <= 0.9.5; fixed in 0.9.6

## Suggested inspection (read-only)
- `python -m pip show open-webui`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on open-webui.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-226f-f24g-524w (OSV record GHSA-226f-f24g-524w lists affected ranges: PyPI open-webui >=0 <0.9.6 (fixed))
- Verified: https://github.com/advisories/GHSA-226f-f24g-524w (GitHub-reviewed advisory GHSA-226f-f24g-524w lists affected ranges: PyPI open-webui >=0 <=0.9.5)

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