CVE-2026-77803

Katalog CVE

CVSS 3.6 · Low EPSS 0,09%

Kerentanan Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling'). Skor CVSS 3.1 3.6 (Low) menurut progress.com.

Deskripsi (NVD)

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, while Fiddler frames the body using Transfer-Encoding only. The remaining bytes on the reused client connection are then parsed as a separate pipelined request, so a local threat actor with low privileges can cause a single malformed request to be split into two requests forwarded to the origin server and receive an additional smuggled response, without requiring a vulnerable server.

Rincian

Terbit di NVD

5 Oktober 2026

Terakhir diubah

6 Oktober 2026

Status NVD

Awaiting Analysis

CVSS 3.1

3.6 (Low), sumber progress.com
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

EPSS (30 hari)

0,09% peluang dieksploitasi; lebih tinggi dari 0,3% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://docs.telerik.com/fiddler/knowledge-base/kb-security-front-end-desynchronization-cve-2026-77803