CVE-2026-87015Medium· 6.8▾ TwilightPoC availableOpen WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 until 0.11.1, backend/open_webui/utils/tools.py captured a cookie jar from the enclosing connection loop instead of binding it to each exte…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 37.4 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 11.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Exploit / PoC code exists
0.3%
Last analysed / modified upstream
0.3% → 0.3%
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 until 0.11.1, backend/open_webui/utils/tools.py captured a cookie jar from the enclosing connection loop instead of binding it to each external tool callable. When multiple tool servers were attached and a session or system OAuth connection was processed last, a request to a different server configured for bearer authentication could include the calling user's Open WebUI session cookies, allowing that server's operator to reuse the session and take over the account. This issue is fixed in version 0.11.1.
open_webui >= 0.6.27, < 0.11.1Upgrade past the affected range:
open_webui 0.11.1Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-87016High· 8.1Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-87997Medium· 4.3Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-87011High· 7.5Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-88001Medium· 5.0Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-88000Medium· 6.5Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-87013Medium· 4.3Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform