BerriAI LiteLLM up to 1.83.6 /chat/completions sql injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in BerriAI LiteLLM up to 1.83.6. Affected by this vulnerability is an unknown functionality of the file /chat/completions. This manipulation causes sql injection. The identification of this vulnerability is CVE-2026-42208. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in BerriAI LiteLLM up to 1.83.6. Affected by this vulnerability is an unknown functionality of the file /chat/completions. The manipulation with an unknown input leads to a sql injection vulnerability. The CWE definition for the vulnerability is CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.81.16 to before version 1.83.7, a database query used during proxy API key checks mixed the caller-supplied key value into the query text instead of passing it as a separate parameter. An unauthenticated attacker could send a specially crafted Authorization header to any LLM API route (for example POST /chat/completions) and reach this query through the proxy's error-handling path. An attacker could read data from the proxy's database and may be able to modify it, leading to unauthorised access to the proxy and the credentials it manages. This issue has been patched in version 1.83.7.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-42208 since 04/25/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a exploit are known. The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 05/08/2026 with a due date of 05/11/2026:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Upgrading to version 1.83.7 eliminates this vulnerability.

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Productinfo

Vendor

• BerriAI

Name

• LiteLLM

Version

• 1.83.0
• 1.83.1
• 1.83.2
• 1.83.3
• 1.83.4
• 1.83.5
• 1.83.6

Website

• Product: https://github.com/BerriAI/litellm/

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