Improper Authorization Vulnerability in BerriAI Litellm Product
CVE-2026-12771

2.3LOW

Key Information:

Vendor

Berriai

Status
Litellm
Vendor
CVE Published:
21 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-12771?

A security flaw has been identified in BerriAI's Litellm product, specifically affecting versions up to 1.82.2. The vulnerability resides in an unknown function within the file litellm/proxy/auth/user_api_key_auth.py, part of the M2M JWT Handler. This vulnerability allows for improper authorization, which could be exploited by an attacker remotely. Although the complexity of exploitation is considered high, the availability of public exploits may pose a significant risk to users of the affected software.

Affected Version(s)

litellm 1.82.0

litellm 1.82.1

litellm 1.82.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-12771 - Proof of Concept

References

https://vuldb.com/vuln/372513
vdb-entry
https://vuldb.com/vuln/372513/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-12771
third-party-advisory

CVSS V4

Score:
2.3
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eric-c (VulDB User)
VulDB CNA Team
.