CVE-2026-87999: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform

Q: How do I fix CVE-2026-87999?

open webui: upgrade to 0.11.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-87999 being exploited?

CVE-2026-87999 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-87999 affect?

CVE-2026-87999 affects open webui. Severity is high (CVSS 7.1). Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.1, POST /api/v1/retrieval/process/web and POST /api/v1/retrieval/process/web/search in backend/open_webui/retrieval/web/utils.py treated Pyt

Q: How urgent is CVE-2026-87999?

Priority 37/100. High severity; Public exploit reference

Routine

HIGH 7.1UPGRADE

CVE-2026-87999 is a high-severity flaw (CVSS 7.1) affecting open webui. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.1, POST /api/v1/retrieval/process/web and POST /api/v1/retrieval/process/web/search in backend/open_webui/retrieval/web/utils.py treated Python's globally routable address classification as proof that a destination was external. An authenticated user could make an Azure-hosted instance fetch and return content from 168.63.129.16, the Azure platform

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-09-09
Last modified	2026-09-16

Publisher (CNA): GitHub, Inc. · Vendor: openwebui

Last updated 2026-09-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-09 22:18 UTCPublished CVE record published
2026-09-16 15:13 UTCUpdated Record last modified

openwebui open webui UPGRADE

Affected: < 0.11.1

Fixed in: 0.11.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy open-webui || rpm -q open-webui || open-webui --version

2. UPGRADE to 0.11.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade open-webui

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade open-webui

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-87999?

open webui: upgrade to 0.11.1. Exact commands for each OS are on this page.

Is CVE-2026-87999 being exploited?

CVE-2026-87999 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-87999 affect?

CVE-2026-87999 affects open webui. Severity is high (CVSS 7.1). Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.1, POST /api/v1/retrieval/process/web and POST /api/v1/retrieval/process/web/search in backend/open_webui/retrieval/web/utils.py treated Pyt

How urgent is CVE-2026-87999?

Priority 37/100. High severity; Public exploit reference

Software pages

Python vulnerabilities · Azure vulnerabilities

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References

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