CVE-2026-77803

Published 5 October 2026 · tracked since 5 October 2026

Description

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, front-end request desynchronization is possible in the proxy request forwarding component. A request that contains both a Content-Length and a Transfer-Encoding header is forwarded with both headers present, whil

References

• NVD — National Vulnerability Database
• CVE.org record (MITRE)
• CISA Known Exploited Vulnerabilities catalog

Latest tracked vulnerabilities

• CVE-2026-102779
• CVE-2026-102777
• CVE-2026-102282 HIGH 7.1
• CVE-2026-88396
• CVE-2026-88393
• CVE-2026-105329 MEDIUM 6.3
• CVE-2026-105397 MEDIUM 5.4
• CVE-2026-104890 HIGH 7.2
• CVE-2026-102426
• CVE-2026-102428

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