CVE-2026-12771

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

1.3CVSS: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

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWEs

CWE-266, CWE-285

Published

2026-06-21

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• litellm:litellm

Packages (OSV)

References

• https://gist.github.com/YLChen-007/70e4e106527f74ddf17953ff0f6c248d
• https://vuldb.com/cve/CVE-2026-12771
• https://vuldb.com/submit/811280
• https://vuldb.com/vuln/372513
• https://vuldb.com/vuln/372513/cti

Check your stackJSON