CVE-2026-42271（litellm litellm）の深刻度・悪用状況・対象バージョン
概要
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.
CISA の要求対応: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
影響を受ける製品
| ベンダー | 製品 | 対象バージョン |
|---|---|---|
| litellm | litellm | ≥ 1.74.2 かつ < 1.83.7 |
| redhat | openshift_ai | ≥ 2.25 かつ < 2.25.8 |
| redhat | openshift_ai | ≥ 3.3 かつ < 3.3.4 |
| redhat | openshift_ai | 3.4 |
基本情報
- 公開日
- 2026-05-08
- 最終更新
- 2026-10-26
- NVD の状態
- Analyzed
- 弱点の種類
- CWE-77 CWE-78
- CVSS 4.0
- 8.7（CVSS: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）
対策の進め方
- 上の表で、使っている製品とバージョンが対象か確認します。
- ベンダーの公式アドバイザリ（下の参考情報の「Vendor Advisory」「Patch」）で修正版・回避策を確認します。
- 悪用が確認されているため、パッチ適用までの間もアクセス制限・侵害の痕跡確認を検討します。
- 日本語の情報は JVN iPedia で CVE-2026-42271 を検索 できます。
参考情報
- https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable ProductRelease Notes
- https://github.com/BerriAI/litellm/security/advisories/GHSA-v4p8-mg3p-g94g MitigationPatchVendor Advisory
- https://access.redhat.com/errata/RHSA-2026:27784 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:28960 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:30056 Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2026-42271 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2467924 Third Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42271.json Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42271 US Government Resource
- NVD: CVE-2026-42271
- CVE.org: CVE-2026-42271
データ出典: NIST NVD、CISA KEV、FIRST EPSS。翻訳は参考情報で、正確性は原文を優先してください。