Threats Tagged 'brew-fastmcp-cve-2025-61920'
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Threats Tagged 'brew-fastmcp-cve-2025-61920'
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0 Authlib versions up to 1.6.3 have a vulnerability in their JOSE implementation where oversized JWS/JWT header or signature segments can cause excessive CPU and memory consumption during verification, leading to denial of service. The vulnerability arises because the library accepts unbounded base64url-encoded segments, which can be crafted to span hundreds of megabytes. Later versions with limits on header and signature segment sizes are not affected. Join the discussion | GCVE Database | 08/13/2026, 17:13:14 UTC Added: 09/18/2026, 01:05:14 UTC |
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