CVE-2026-12798

BerriAI litellm MCP OpenAPI Spec Loader openapi_to_mcp_generator.py load_openapi_spec_async server-side request forgery

LOW 2.1EPSS 0.4%

A weakness has been identified in BerriAI litellm up to 1.82.2. Affected by this vulnerability is the function load_openapi_spec_async of the file litellm/proxy/_experimental/mcp_server/openapi_to_mcp_generator.py of the component MCP OpenAPI Spec Loader. This manipulation of the argument spec_path causes server-side request forgery. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.

Affected: BerriAI · litellm
CVSS v4.0 VULDB: 2.1 LOWCVSS:4.0/AV:N/AC:L/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:X/V:X/RE:X/U:X
CVSS v4.0 GitHub: 2.1 LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CVSS v3.1 VULDB: 6.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS v2.0 VULDB: 6.5 MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
EPSS: 0.40% chance of exploitation in the next 30 days, 33rd percentile
Published: 2026-06-21
Updated: 2026-06-22

Proof-of-concept exploits (1)

https://gist.github.com/YLChen-007/c1104c529975699ba347feedfbe02c5a

CVE-2026-12798

Proof-of-concept exploits (1)

Security advisories

References