CASCACascade Atlas

Evidence dossier

CVE-2026-42271

LiteLLM: Authenticated command execution via MCP stdio test endpoints

79.7–94.9Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.74.2 to before version 1.83.7, two endpoints used to preview an MCP server before saving it — POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list — accepted a full server configuration in the request body, including the command, args, and env fields used by the stdio transport. When called with a stdio configuration, the endpoints attempted to connect, which spawned the supplied command as a subprocess on the proxy host with the privileges of the proxy process. The endpoints were gated only by a valid proxy API key, with no role check. Any authenticated user — including holders of low-privilege internal-user keys — could therefore run arbitrary commands on the host. This issue has been patched in version 1.83.7.

State
PUBLISHED
Published
May 8, 2026
Updated
Jul 15, 2026
Evidence coverage
85%
CISA KEVCatalog member

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

FIRST EPSS80.19%

2026-07-18 · v2026.06.15 · percentile 99.6%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

GitHub_Moriginal assertion
container

LiteLLM: Authenticated command execution via MCP stdio test endpoints

redhat-SADPunknown origin
container

litellm: LiteLLM: Authenticated command execution via MCP stdio test endpoints

CISA KEVoriginal assertion
observed_exploitation

BerriAI LiteLLM Command Injection Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.801880000000; percentile 0.995740000000

Applicability

Cited product scope

Trace impact →
BerriAIlitellm
[{"status": "affected", "version": ">= 1.74.2, < 1.83.7"}]unknown
Red HatExploit Intelligence
[]unknown
Red HatRed Hat Ansible Automation Platform 2
[]unknown
Red HatRed Hat Ansible Automation Platform 2
[]unknown
Red HatRed Hat OpenShift AI 2.25
[{"status": "unaffected", "version": "1781826406", "lessThan": "*", "versionType": "rpm"}]unknown
Red HatRed Hat OpenShift AI 3.3
[{"status": "unaffected", "version": "1782310008", "lessThan": "*", "versionType": "rpm"}]unknown
Red HatRed Hat OpenShift AI 3.4
[{"status": "unaffected", "version": "1781622627", "lessThan": "*", "versionType": "rpm"}]unknown
Red HatRed Hat OpenShift AI (RHOAI)
[]unknown
Unknown vendorUnknown product
cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*; start including 1.74.2; end excluding 1.83.7supported
Unknown vendorUnknown product
cpe:2.3:a:redhat:openshift_ai:*:*:*:*:*:*:*:*; start including 2.25; end excluding 2.25.8supported
Unknown vendorUnknown product
cpe:2.3:a:redhat:openshift_ai:*:*:*:*:*:*:*:*; start including 3.3; end excluding 3.3.4supported
Unknown vendorUnknown product
cpe:2.3:a:redhat:openshift_ai:3.4:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

8.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7
security-advisories@github.comCVSS 4.0 · role SecondaryCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N/E:X/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
8.8
0b0ca135-0b70-47e7-9f44-1890c2a1c46cCVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7
GitHub_MCVSS 4.0 · role unknownCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N
8.8
redhat-SADPCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.