high · 7.1Automated intelligence
CVE-2026-109311
CVE-2026-109311: vLLM
vLLM / vLLM / See source advisory
vLLM before 0.29.0 passes uploaded audio to the PyAV/FFmpeg av.open() fallback with only a file-size check, exposing FFmpeg's IAMF parser heap overflow. Authenticated remote attackers can repeatedly upload malformed IAMF containers to /v1/audio/transcriptions, corrupting the heap and crashing the API process.
medium · 5.1Automated intelligence
CVE-2026-109300
CVE-2026-109300: Open WebUI
Open WebUI / Open WebUI / See source advisory
Open WebUI from 0.6.31 before 0.11.4 contains a stored cross-site scripting vulnerability in its Markdown renderer, which treats user-authored tool-call details blocks as tool output and mounts their embeds attribute in script-enabled iframes. Authenticated users can post crafted channel messages, chat messages, or citation content that runs JavaScript in viewers' browsers, enabling in-app phishing, or session hijacking where iframeSandboxAllowSameOrigin is enabled.
high · 7.1Automated intelligence
CVE-2026-109299
CVE-2026-109299: Open WebUI
Open WebUI / Open WebUI / See source advisory
Open WebUI from 0.9.0 before 0.11.4 contains a denial of service vulnerability that allows authenticated users with automations permission to stall the instance by submitting unsatisfiable recurrence rules. Attackers can repeatedly send rules like February 30th to the automations create or update endpoints, blocking the shared event loop for seconds per request.
high · 7.1Automated intelligence
CVE-2026-109298
CVE-2026-109298: Open WebUI
Open WebUI / Open WebUI / See source advisory
Open WebUI 0.11.0 before 0.11.4 compiles user-chosen grep patterns for its knowledge and chat file search tools with a regex engine that expands nested counted repetition unbounded at compile time and caches the result. Authenticated users can have the model call grep_knowledge_files with short nested-repetition patterns, blocking the event loop and exhausting worker memory.
high · 7.1Automated intelligence
CVE-2026-109297
CVE-2026-109297: Open WebUI
Open WebUI / Open WebUI / See source advisory
Open WebUI 0.11.0 before 0.11.4 contains a denial of service vulnerability in the automation recurrence-rule validator, whose sub-daily frequency guard parses rule text more strictly than the calendar library that executes it. Users permitted to create automations can submit whitespace-folded rules (or, in 0.11.0, lowercase frequencies or omitted RRULE prefixes) that expand per-second synchronously, blocking the shared event loop for minutes per request and on every scheduler poll.
medium · 5.3Automated intelligence
CVE-2026-109296
CVE-2026-109296: Open WebUI
Open WebUI / Open WebUI / See source advisory
Open WebUI before 0.11.4 contains a missing authorization vulnerability that allows authenticated users to reach disabled model provider backends by supplying an explicit backend index. Attackers can pass the index as a path segment or query parameter on Ollama and OpenAI-compatible listing routes to trigger requests carrying configured API keys, read version strings, and enumerate connections.
high · 7.1Automated intelligence
CVE-2026-109295
CVE-2026-109295: Open WebUI
Open WebUI / Open WebUI / See source advisory
Open WebUI from 0.11.0 before 0.11.4 contains a regular expression denial of service vulnerability that allows authenticated users to stall server workers via file search patterns. Attackers can instruct the model to call grep_knowledge_files or grep_chat_files with a catastrophically backtracking regex, blocking the event loop for two seconds per repeated call.
high · 7.1Automated intelligence
CVE-2026-109294
CVE-2026-109294: Open WebUI
Open WebUI / Open WebUI / See source advisory
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.
high · 7.1Automated intelligence
CVE-2026-109293
CVE-2026-109293: Open WebUI
Open WebUI / Open WebUI / See source advisory
Open WebUI from 0.11.0 before 0.11.4 contains an information disclosure vulnerability that allows authenticated non-admin users with tool export permission to obtain tool source code shared with them read-only. Attackers can request GET /api/v1/tools/export to retrieve the full Python source of read-only shared tools, exposing embedded API keys and credentials.
high · 7.6Automated intelligence
CVE-2026-109292
CVE-2026-109292: Open WebUI
Open WebUI / Open WebUI / See source advisory
Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure vulnerability that allows destination servers to obtain user session cookies by receiving the full browser cookie jar on OAuth-mode connections. Operators of OpenAI-compatible connections, OpenAPI tool servers or terminal servers can capture forwarded session cookies from routine requests and replay them to hijack accounts, including administrators.
high · 8.5Automated intelligence
CVE-2026-109291
CVE-2026-109291: Open WebUI
Open WebUI / Open WebUI / See source advisory
Open WebUI from 0.6.33 before 0.11.4 contains a cross-site scripting vulnerability that allows authenticated users to execute script in victims' sessions by storing javascript: URLs in citation embed_url fields. Attackers can share a crafted chat whose citation, when clicked, is passed to window.open, letting them steal localStorage.token and act as the victim.
high · 8.4Automated intelligence
CVE-2026-109290
CVE-2026-109290: Open WebUI
Open WebUI / Open WebUI / See source advisory
Open WebUI from 0.11.1 before 0.11.4 contains a stored cross-site scripting vulnerability in DocxPreview.svelte that allows authenticated users to execute script by uploading crafted DOCX attachments. Attackers can embed an OOXML altChunk HTML part or script-scheme hyperlink to steal a previewing administrator's session token from local storage and take over the instance.