Threats Tagged 'cve-2026-77803'
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Threats Tagged 'cve-2026-77803'
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CVE-2026-77803 is a low-severity HTTP request/response smuggling vulnerability in Progress Telerik Fiddler Classic for Windows versions prior to 6.0.20262.10021. The issue arises because the proxy forwards requests containing both Content-Length and Transfer-Encoding headers with both headers present, but frames the body using Transfer-Encoding only. This causes the remaining bytes on a reused client connection to be interpreted as a separate pipelined request. A local low-privilege attacker can exploit this to split a single malformed request into two forwarded requests and receive an additional smuggled response without needing a vulnerable server. Join the discussion | CVE Database V5 | 10/05/2026, 12:39:36 UTC Added: 10/05/2026, 13:04:17 UTC |
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