CVE-2026-59213: open webui — Exploit & Fix

Description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 before 0.10.0, get_all_models handlers in routers/openai.py and routers/ollama.py passed a lambda to aiocache key instead of key_builder, causing permission-filtered per-user model lists to share a static cache entry and exposing one user’s model list to another caller during the TTL window. This issue is fixed in version 0.10.0.

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CVSS v3.1 Score

3.5

LOW

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

EPSS — Exploit Prediction

0.0030

Probability of exploitation

0.22%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-524 CWE-524

Affected Products

Vendor	Product	Versions
openwebui	open_webui	0.6.27 — 0.10.0

References

Advisories & Patches

https://github.com/open-webui/open-webui/commit/0fc630b34b2899599dabffffa012afd47599aa75 https://github.com/open-webui/open-webui/pull/25783 https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq

Exploits

https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq

Other References

https://github.com/open-webui/open-webui/releases/tag/v0.10.0

Frequently Asked Questions

What is CVE-2026-59213? +

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 before 0.10.0, get_all_models handlers in routers/openai.py and routers/ollama.py passed a lambda to aiocache key instead of key_builder, causing permission-filtered per-user model lists to share a static cache entry and exposing one user’s model list to another caller during the TTL window. This issue is fixed in version 0.10.0. It has a CVSS v3.1 base score of 3.5 (LOW).

How severe is CVE-2026-59213? +

CVE-2026-59213 has a CVSS v3.1 score of 3.5 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0030, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-59213? +

CVE-2026-59213 affects products from openwebui, specifically: open_webui. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-59213? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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