SEPTEMBER 15, 2026
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Case File

CVE-2026-87015

MEDIUM · CVSS 6.8 EPSS 0.28% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-09 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

The Open WebUI platform versions 0.6.27 to 0.11.1 are vulnerable due to improper handling of session cookies, which can lead to session hijacking when multiple tool servers are used. This allows an attacker operating a different server to reuse the victim's session, potentially compromising user accounts. Organizations using affected versions should prioritize upgrading to version 0.11.1 to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-87015
Severity
MEDIUM
CVSS
6.8
EPSS
0.28%

Original NVD Description

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.