https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-03T14:04:25.772223+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/brew-aider-cve-2026-59822 BREW-aider-CVE-2026-59822 — LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback 2026-10-03T14:04:25.873162+00:00

Affected: Homebrew: aider

### Impact

LiteLLM's MCP Streamable HTTP endpoint could allow an unauthenticated attacker to establish an authenticated MCP session using an arbitrary Bearer token.

The MCP auth handler supported OAuth2 passthrough for upstream MCP servers, but the fallback path could replace failed LiteLLM key validation with an empty `UserAPIKeyAuth()` object. This allowed requests with a fabricated `Authorization` header to reach MCP tooling without a valid LiteLLM key.

An attacker could use this to list and call configured MCP tools and access connected services exposed through MCP.

### Patches

The issue is fixed in `1.84.0`.

We recommend upgrading to `1.84.0` or later.

### Workarounds

If upgrading is not immediately possible, disable MCP routes or block access to `/mcp/` and related MCP endpoints at your reverse proxy or API gateway.

### References

* [v1.84.0](https://github.com/BerriAI/litellm/releases/tag/v1.84.0)

 https://cve.radiocsirt.org/vuln/euvd-2026-363348 EUVD-2026-363348 2026-10-03T14:04:25.873235+00:00 EUVD-2026-363348 https://cve.radiocsirt.org/vuln/fkie_cve-2026-59822 fkie_cve-2026-59822 2026-10-03T14:04:25.873252+00:00

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced failed LiteLLM key validation with an empty UserAPIKeyAuth() object, allowing requests to reach MCP tooling without a valid LiteLLM key. This issue is fixed in version 1.84.0.

 https://cve.radiocsirt.org/vuln/ghsa-7488-6r32-c95q GHSA-7488-6r32-c95q — LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback 2026-10-03T14:04:25.873277+00:00

Affected: PyPI: litellm

### Impact

LiteLLM's MCP Streamable HTTP endpoint could allow an unauthenticated attacker to establish an authenticated MCP session using an arbitrary Bearer token.

The MCP auth handler supported OAuth2 passthrough for upstream MCP servers, but the fallback path could replace failed LiteLLM key validation with an empty `UserAPIKeyAuth()` object. This allowed requests with a fabricated `Authorization` header to reach MCP tooling without a valid LiteLLM key.

An attacker could use this to list and call configured MCP tools and access connected services exposed through MCP.

### Patches

The issue is fixed in `1.84.0`.

We recommend upgrading to `1.84.0` or later.

### Workarounds

If upgrading is not immediately possible, disable MCP routes or block access to `/mcp/` and related MCP endpoints at your reverse proxy or API gateway.

### References

* [v1.84.0](https://github.com/BerriAI/litellm/releases/tag/v1.84.0)

 https://cve.radiocsirt.org/vuln/pysec-2026-3479 PYSEC-2026-3479 — LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback 2026-10-03T14:04:25.873308+00:00

Affected: PyPI: litellm

### Impact

LiteLLM's MCP Streamable HTTP endpoint could allow an unauthenticated attacker to establish an authenticated MCP session using an arbitrary Bearer token.

The MCP auth handler supported OAuth2 passthrough for upstream MCP servers, but the fallback path could replace failed LiteLLM key validation with an empty `UserAPIKeyAuth()` object. This allowed requests with a fabricated `Authorization` header to reach MCP tooling without a valid LiteLLM key.

An attacker could use this to list and call configured MCP tools and access connected services exposed through MCP.

### Patches

The issue is fixed in `1.84.0`.

We recommend upgrading to `1.84.0` or later.

### Workarounds

If upgrading is not immediately possible, disable MCP routes or block access to `/mcp/` and related MCP endpoints at your reverse proxy or API gateway.

### References

* [v1.84.0](https://github.com/BerriAI/litellm/releases/tag/v1.84.0)

 https://cve.radiocsirt.org/vuln/wid-sec-w-2026-2263 WID-SEC-W-2026-2263 — LiteLLM: Mehrere Schwachstellen 2026-10-03T14:04:25.873337+00:00

Ein Angreifer kann mehrere Schwachstellen in LiteLLM ausnutzen, um Informationen offenzulegen, Daten zu manipulieren, Code auszuführen und um Sicherheitsmaßnahmen zu umgehen.