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CVE-2026-87996: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform

39
Routine
HIGH 7.7UPGRADE

CVE-2026-87996 is a high-severity flaw (CVSS 7.7) 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 0.9.6 until 0.11.1, SafePlaywrightURLLoader in backend/open_webui/retrieval/web/utils.py validated a user-controlled hostname in Python and then let the Playwright browser resolve it again in the sync and async request interceptors. An authenticated user controlling authoritative DNS could return a public address to validation and an internal address to the

Why this priority

  • High severity
  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score7.7 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.4% (top 71%)
CISA exploited listNo
WeaknessCWE-367, CWE-918
Published2026-09-09
Last modified2026-09-16
Publisher (CNA): GitHub, Inc. · Vendor: openwebui

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

Am I affected?

Timeline

openwebui open webui UPGRADE
Affected: >= 0.9.6 and < 0.11.1
Fixed in: 0.11.1
Safe to downgrade to: a release before 0.9.6
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 0.9.6 (Debian / Ubuntu)
apt-cache madison open-webui sudo apt install open-webui=<VERSION_BEFORE_0.9.6> 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_0.9.6> 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-2026-87996?

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

Is CVE-2026-87996 being exploited?

CVE-2026-87996 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-2026-87996 affect?

CVE-2026-87996 affects open webui. Severity is high (CVSS 7.7). Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.1, SafePlaywrightURLLoader in backend/open_webui/retrieval/web/utils.py validated a user-controlled hostname in Python and then let

How urgent is CVE-2026-87996?

Priority 39/100. High severity; Public exploit reference

Software pages

Python vulnerabilities

Related CVEs

References

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