Authentication bypass in PraisonAI MCP server token validation
CVE-2026-34953 affects PraisonAI, a multi-agent teams system, in versions prior to 4.5.97. The flaw is in OAuthManager.validate_token(), which returns True for tokens not found in its internal token store. Because that store is empty by default, arbitrary Bearer tokens supplied in HTTP requests to the MCP server are accepted as authenticated. This results in an authentication bypass on the MCP server, allowing unauthorized access to all registered tools and agent capabilities exposed through the service.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Remediation
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Exploits
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No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
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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.