How severe is CVE-2026-12798?

CVE-2026-12798 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-12798 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-12798?

CVE-2026-12798 affects Litellm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-12798?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-12798 have an EU (EUVD) identifier?

Yes. CVE-2026-12798 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38157.

When was CVE-2026-12798 published?

CVE-2026-12798 was published on 2026-06-21 and last updated on 2026-06-24.

CVE-2026-12798

CVE-2026-12798 is a medium-severity vulnerability in Litellm with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38157
Weakness: CWE-918
Affected product: Litellm
Published: 2026-06-21
Last modified: 2026-06-24

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.

Frequently asked questions

What is CVE-2026-12798?: 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.
How severe is CVE-2026-12798?: CVE-2026-12798 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-12798 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-12798?: CVE-2026-12798 affects Litellm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-12798?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-12798 have an EU (EUVD) identifier?: Yes. CVE-2026-12798 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38157.
When was CVE-2026-12798 published?: CVE-2026-12798 was published on 2026-06-21 and last updated on 2026-06-24.

References

Affected products (1)

cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*

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