CVE-2026-54020: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform

Q: How do I fix CVE-2026-54020?

open webui: upgrade to 0.11.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-54020 being exploited?

CVE-2026-54020 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-2026-54020 affect?

CVE-2026-54020 affects open webui. Severity is medium (CVSS 6.3). Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.0, Open WebUI resolved a hostname during URL validation and rejected private, loopback, and link-local addresses, but the HTTP clients resol

Q: How urgent is CVE-2026-54020?

Priority 26/100. No elevated risk signals yet.

Routine

MEDIUM 6.3UPGRADE

CVE-2026-54020 is a medium-severity flaw (CVSS 6.3) 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 0.11.0, Open WebUI resolved a hostname during URL validation and rejected private, loopback, and link-local addresses, but the HTTP clients resolved the hostname again at connection time. An authenticated attacker who controlled authoritative DNS for a submitted hostname could answer with a public address during validation and an internal one during con

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-367, CWE-918
Published	2026-08-04
Last modified	2026-09-18

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

Last updated 2026-09-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-04 21:16 UTCPublished CVE record published
2026-09-18 14:58 UTCUpdated Record last modified

openwebui open webui UPGRADE

Affected: < 0.11.0

Fixed in: 0.11.0

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 0.11.0 (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-2026-54020?

open webui: upgrade to 0.11.0. Exact commands for each OS are on this page.

Is CVE-2026-54020 being exploited?

CVE-2026-54020 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-2026-54020 affect?

CVE-2026-54020 affects open webui. Severity is medium (CVSS 6.3). Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.0, Open WebUI resolved a hostname during URL validation and rejected private, loopback, and link-local addresses, but the HTTP clients resol

How urgent is CVE-2026-54020?

Priority 26/100. No elevated risk signals yet.

Related CVEs

CVE-2026-70487 MEDIUM 5.3 UPGRADE Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-70488 MEDIUM 4.3 UPGRADE Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-70489 MEDIUM 6.5 UPGRADE Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-70490 MEDIUM 6.3 UPGRADE Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-70491 MEDIUM 6.5 UPGRADE Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform

References

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