What is CVE-2026-70493?

CVE-2026-70493 is a medium-severity vulnerability in Open-webui, classified under Inefficient Regular Expression Complexity. CVSS score: 6.5/10. Published 2026-08-04.

How severe is CVE-2026-70493?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Open-webui

CVE-2026-70493

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the built-in knowledge search path in backend/open_webui/tools/knowledge_fs.py and backend/open_webui/tools/builtin.py let a cha…

Vulnerability class: ReDoS (Regular Expression Denial of Service)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Open-webui — versions >= 0.9.6, < 0.11.0

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-70493?: CVE-2026-70493 is a medium-severity vulnerability in Open-webui, classified under Inefficient Regular Expression Complexity. CVSS score: 6.5/10. Published 2026-08-04.
How severe is CVE-2026-70493?: Medium severity. CVSS v3 base score is 6.5 out of 10.