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CVE-2026-59822 is an improper-authentication vulnerability in LiteLLM versions prior to 1.84.0 affecting the Model Context Protocol (MCP) Streamable HTTP functionality. A fabricated Authorization header triggers an OAuth2 passthrough fallback after LiteLLM key validation fails. Rather than rejecting the request, the fallback creates an empty UserAPIKeyAuth object, causing the request to be treated as authenticated and forwarded to configured MCP tooling without a valid LiteLLM key.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
40 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A LiteLLM Model Context Protocol (MCP) authentication-bypass flaw through which an arbitrary or meaningless Bearer token can establish a valid session to a connected MCP server and access connected tools.
An authentication-bypass vulnerability in LiteLLM's MCP endpoint that permits a meaningless Bearer token to establish a valid session with a connected MCP server, potentially exposing connected database, repository, file-system, or workflow tools.
A LiteLLM MCP authentication-bypass vulnerability that accepts arbitrary Bearer tokens, including one-character tokens, to establish an authenticated MCP session and access the MCP tools configured on the affected instance. It was added to CISA's Known Exploited Vulnerabilities catalog.
An authentication-bypass vulnerability in LiteLLM's Model Context Protocol (MCP) endpoint. Any arbitrary Bearer token can create a valid MCP session, potentially granting access to connected MCP tools and their underlying data or actions.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.