CVE-2026-88001: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform

Routine

MEDIUM 5.0UPGRADE

CVE-2026-88001 is a medium-severity flaw (CVSS 5.0) 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. From 0.9.5 until 0.11.1, server-side web fetches did not reapply WEB_FETCH_FILTER_LIST or private-address controls to HTTP redirect destinations when AIOHTTP_CLIENT_ALLOW_REDIRECTS was enabled. An authenticated user could redirect the aiohttp and requests fetch paths to excluded hosts, loopback, private networks, or cloud metadata services and route resulting co

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-09-09
Last modified	2026-09-14

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

Last updated 2026-09-14 · 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
2026-09-14 19:56 UTCUpdated Record last modified

openwebui open webui UPGRADE

Affected: >= 0.9.5 and < 0.11.1

Fixed in: 0.11.1

Safe to downgrade to: a release before 0.9.5

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.

3. If no update is available yet, DOWNGRADE to a release before 0.9.5 (Debian / Ubuntu)

apt-cache madison open-webui sudo apt install open-webui=<VERSION_BEFORE_0.9.5> sudo apt-mark hold open-webui

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list open-webui sudo dnf downgrade open-webui-<VERSION_BEFORE_0.9.5> sudo dnf versionlock add open-webui

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-88001?

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

Is CVE-2026-88001 being exploited?

CVE-2026-88001 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-2026-88001 affect?

CVE-2026-88001 affects open webui. Severity is medium (CVSS 5.0). Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 until 0.11.1, server-side web fetches did not reapply WEB_FETCH_FILTER_LIST or private-address controls to HTTP redirect destinations when AIOH

How urgent is CVE-2026-88001?

Priority 30/100. Public exploit reference

Related CVEs

CVE-2026-88005 MEDIUM 6.5 UPGRADE Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-88006 MEDIUM 6.5 UPGRADE Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-87017 MEDIUM 4.3 UPGRADE Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-87994 MEDIUM 4.3 UPGRADE Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-87995 HIGH 8.7 UPGRADE Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform

References

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