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Vulnerability record · CVE-2026-12771 · published 21 June 2026

CVE-2026-12771: Litellm improper authorization vulnerability

Litellm · Litellm

A vulnerability was identified in BerriAI litellm up to 1.82.2. This affects an unknown function of the file litellm/proxy/auth/user_api_key_auth.py of the component M2M JWT Handler. Such manipulation leads to improper authorization. The attack can be launched remotely. A high complexity level is associated with this attack. The exploitability is reported as difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.

1.3 CVSS 4.0 Low EPSS 0.43% · top 64.6% CWE-266 · CWE-266CWE-285 · Improper authorization
1.3CVSS 4.0 base score, v2 4.6
0.43%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 2 tagged exploit
24 Jun 2026Last modified by NVD

Description

A vulnerability was identified in BerriAI litellm up to 1.82.2. This affects an unknown function of the file litellm/proxy/auth/user_api_key_auth.py of the component M2M JWT Handler. Such manipulation leads to improper authorization. The attack can be launched remotely. A high complexity level is associated with this attack. The exploitability is reported as difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gist.github.com/YLChen-007/70e4e106527f74ddf17953ff0f6c248d ExploitThird Party Advisory
https://vuldb.com/cve/CVE-2026-12771 Third Party AdvisoryVDB Entry
https://vuldb.com/submit/811280 Third Party AdvisoryExploitVDB Entry
https://vuldb.com/vuln/372513 Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/372513/cti Permissions RequiredVDB Entry

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-12771), CISA KEV, FIRST EPSS (scores of 2026-10-09). This page is refreshed as NVD updates the record.