EUVD-2026-75188
GHSA-jqhh-cjmq-vmv6
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Network-reachable via API, low complexity, any authenticated user (PR:L), no interaction; pure availability impact with no confidentiality or integrity consequences.
Primary rating from Vendor (github).
CVSS VectorVendor: github
Lifecycle Timeline
3DescriptionCVE.org
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.1, the message-chain reconstruction helper in backend/open_webui/utils/misc.py advanced through a chat history by map key but tracked visited entries using each message body's optional id field. An authenticated user could store id-less messages in a parent cycle and trigger a non-terminating walk that blocked the async event loop, grew memory until termination, and remained persistent across process restarts. This issue is fixed in version 0.11.1.
AnalysisAI
Infinite-loop denial-of-service in Open WebUI 0.5.0-0.11.0 allows any authenticated user to permanently crash the backend service by storing id-less messages in a cyclic parent chain. The flaw in get_message_list (backend/open_webui/utils/misc.py) caused the chat-history traversal to never terminate, blocking the async event loop and consuming memory until the process died - with the condition persisting across restarts until an operator manually removes the offending messages or upgrades. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated session with at least the default user role (PR:L per CVSS); no administrative or elevated privileges are needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) accurately reflects the attack surface: the vulnerability is network-reachable, requires only a valid login, has no complexity barrier, and delivers a high availability impact with zero confidentiality or integrity consequence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Open WebUI to version 0.11.1 or later; the patched release is available at https://github.com/open-webui/open-webui/releases/tag/v0.11.1 and the fixing commit is 5c79ccc9e5c9efc2bc024d8f0b9757652ece929a. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Open Webui
View allA vulnerability in open-webui/open-webui version 0.3.8 allows an attacker with a user-level account to perform a session
An XSS vulnerability exists in open-webui/open-webui versions <= 0.3.8, specifically in the function that constructs the
A Stored Cross-Site Scripting (XSS) vulnerability exists in the chat file upload functionality of open-webui/open-webui
A vulnerability in open-webui/open-webui versions <= 0.3.8 allows remote code execution by non-admin users via Cross-Sit
Attacker controlled files can be uploaded to arbitrary locations on the web server's filesystem by abusing a path traver
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.6.37, a St
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.6.37, a Se
A stored cross-site scripting (XSS) vulnerability exists in open-webui/open-webui version 0.3.8. Rated high severity (CV
In version v0.3.10 of open-webui/open-webui, the `api/v1/utils/pdf` endpoint lacks authentication mechanisms, allowing u
In open-webui version 0.3.8, the endpoint `/models/upload` is vulnerable to arbitrary file write due to improper handlin
The `/openai/models` endpoint in open-webui/open-webui version 0.3.8 is vulnerable to Server-Side Request Forgery (SSRF)
In version 0.3.32 of open-webui/open-webui, the absence of authentication mechanisms allows any unauthenticated attacker
Same technique Denial Of Service
View allShare
External POC / Exploit Code
Leaving vuln.today