CVE-2026-12798 BerriAI litellm MCP OpenAPI Spec Loader openapi_to_mcp_generator.py load_openapi_spec_async server-side request forgery
Remote attackers can exploit a server-side request forgery vulnerability in the MCP OpenAPI Spec Loader to access internal resources.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-12798?
CVE-2026-12798 is a medium-severity server-side request forgery vulnerability in BerriAI litellm, published on 21 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-12798?
3 open source packages ship an affected version, including litellm. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
litellm PyPI | All versions to 1.82.2 | None |
litellm PyPI | All versions to 1.82.2 | None |
litellm PyPI | All versions to 1.82.2 | None |
Products include Litellm Litellm.
How do I fix CVE-2026-12798?
Upgrade to a fixed version.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-12798 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12798 exists.
Other vulnerabilities in BerriAI litellm
Sources
Also known as GHSA-c693-x898-5g4h, MINI-9vr8-mrwg-j4jv, MINI-g9h5-v85r-86q7, MINI-hqc2-fxh8-4pmv, MINI-r7pg-vgvm-7c2w, PYSEC-2026-4069.