CVE-2026-109294: Open WebUI from 0.6.42 before 0.11.4 contains an uncontrolled resource consumption vulnerability that allows a

Routine

MEDIUM 6.5

CVE-2026-109294 is a medium-severity flaw (CVSS 6.5) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Open WebUI from 0.6.42 before 0.11.4 contains an uncontrolled resource consumption vulnerability that allows authenticated users to exhaust server memory by supplying compressed remote image URLs in chat messages. Attackers can point the image field at a host returning gzip-encoded responses, which get_image_base64_from_url decompresses unbounded, causing denial of service for all users.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-400, CWE-409
Published	2026-10-12
Last modified	2026-10-23

Publisher (CNA): VulnCheck

Timeline

2026-10-12 17:17 UTCPublished CVE record published
2026-10-23 22:16 UTCUpdated Record last modified

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References

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