Detections
Analytics

Chainguard: multiple open-webui packages: security update to 0.12.3-r1

medium Tenable Cloud Security Plugin ID 476119

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol (MCP).
 From 1.8.0 until 1.30.0 and 2.2.0, stateful Streamable HTTP servers, including FastMCP, MCPServer,
 Server.streamable_http_app(), and StreamableHTTPSessionManager, retain session entries without an idle
 expiration or aggregate session-count limit. DELETE, refused opening requests, and completed sessions do
 not reliably discard their entries, and each entry can retain parsed initialize parameters. A client that
 can reach the endpoint can therefore create ordinary short requests that grow server memory without bound
 until restart. Stateless HTTP, stdio, and SSE transports are not affected. This issue is fixed in versions
 1.30.0 and 2.2.0. (CVE-2026-59951)

Solution

Update the open-webui library and its related packages to version 0.12.3-r1 or later.

Plugin Details

Severity: Medium

ID: 476119

Version: Revision 1.1

Type: Local

Published: 10/17/2026

Updated: 10/17/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.67

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-59951

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 10/14/2026

Reference Information

CVE: CVE-2026-59951