Interpretation Conflict Affecting litellm package, versions <1.89.0-r2


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.18% (8th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-CHAINGUARDLATEST-LITELLM-17376261
  • published19 Jun 2026
  • disclosed22 Jun 2026

Introduced: 19 Jun 2026

NewCVE-2026-53538  (opens in a new tab)
CWE-436  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade Chainguard litellm to version 1.89.0-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream litellm package and not the litellm package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, QuerystringParser treated ; as a field separator in application/x-www-form-urlencoded bodies, in addition to &. The WHATWG URL standard, modern browsers, and Python's urllib.parse (since the CVE-2021-23336 fix) treat only & as a separator. This creates a parser differential: the same bytes are tokenized into different fields than a WHATWG compliant intermediary would produce, allowing an attacker to smuggle extra form fields past an upstream body inspecting component. This vulnerability is fixed in 0.0.30.

CVSS Base Scores

version 3.1