Detections
Analytics

Echo: litellm: security update to 1.83.9

medium Tenable Cloud Security Plugin ID 461827

Description

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

 - LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.9, an
 authenticated LiteLLM Proxy caller with a valid virtual key can place api_base inside the user_config
 request body to bypass is_request_body_safe, which blocks top-level api_base and base_url but previously
 did not inspect or reject user_config. Because user_config constructs the outbound router, the nested
 destination redirects a server-side request to an internal or external host selected by the caller and can
 expose endpoints the caller cannot otherwise access. This issue is fixed in version 1.83.9.
 (CVE-2026-59823)

Solution

Update the litellm library and its related packages to version 1.83.9 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-59823

Plugin Details

Severity: Medium

ID: 461827

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.25

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2026-59823

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

CVSS v4

Risk Factor: Medium

Base Score: 5.3

Threat Score: 1.3

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/18/2026

Vulnerability Publication Date: 9/16/2026

Reference Information

CVE: CVE-2026-59823