Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, any authenticated user can overwrite any file's content by ID through the `POST /api/v1/retrieval/process/files/batch` endpoint. The endpoint performs no ownership check, so a regular user with read access to a shared knowledge base can obtain file UUIDs via `GET /api/v1/knowledge/{id}/files` and then overwrite those files, escalating from read to write. The overwritten content is served to the LLM via RAG, meaning the attacker controls what the model tells other users. Version 0.8.6 patches the issue.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
NONE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-28788 Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, any authenticated user can overwrite any fi… https://www.cve.org/CVERecord?id=CVE-2026-28788
Post summary
The post provides a brief disclosure of CVE-2026-28788, noting that authenticated users can overwrite files before v0.8.6.
⚡ New CVE Alert: CVE-2026-28788 📊 Severity: 7.1 🚨 Risk Level: High 🧩 Affects: Multiple / Unspecified Products Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-28788 #CVE-2026-28788 #CVE #High #CyberSecurity #InfoSec https://t.co/qyihsPCW2r
Post summary
The tweet announces the new CVE‑2026‑28788 with a high‑risk severity score and links to the NVD entry, but provides no further technical or exploitation details.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | openwebui | open_webui | - | - | - |