BerriAI litellm up to 1.82.2 M2M JWT user_api_key_auth.py improper authorization

Summaryinfo

A vulnerability, which was classified as critical, has been found in BerriAI litellm up to 1.82.2. This impacts an unknown function of the file litellm/proxy/auth/user_api_key_auth.py of the component M2M JWT Handler. Performing a manipulation results in improper authorization. This vulnerability was named CVE-2026-12771. The attack may be initiated remotely. In addition, an exploit is available. The vendor was contacted early about this disclosure.

Detailsinfo

A vulnerability, which was classified as critical, was found in BerriAI litellm up to 1.82.2. This affects an unknown functionality of the file litellm/proxy/auth/user_api_key_auth.py of the component M2M JWT Handler. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at gist.github.com. This vulnerability is uniquely identified as CVE-2026-12771. The exploitability is told to be difficult. It is possible to initiate the attack remotely. Technical details and a public exploit are known. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

The exploit is shared for download at gist.github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• BerriAI

Name

• litellm

Version

• 1.82.0
• 1.82.1
• 1.82.2

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Threat Intelligenceinfo

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Entryinfo

Submitinfo

Accepted

• Submit #811280: litellm <= 1.82.2 Improper Authorization (CWE-285) (by Eric-c)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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