CVE-2026-54388criticalCWE-444

CVE-2026-54388: fallo crítico en tinyproxy

Tinyproxy - HTTP Request Smuggling via Duplicate Content-Length Headers

Publicada el · Actualizada el

Seguir esta CVE+ Monitorear tinyproxy+ Monitorear tinyproxy

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

28Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 9.3epss 0.4%
Tinyproxy through 1.11.3, fixed in commit 364cdb6, fails to reject requests containing multiple Content-Length headers with differing values, forwarding all duplicate headers to the backend while using the first value to determine how many request body bytes to consume. Remote attackers can desynchronize the proxy and backend parser state, allowing injection of arbitrary HTTP requests to the backend to enable cache poisoning, access control bypass, and request hijacking.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Productos afectados
tinyproxy · tinyproxy
CVEs relacionadas — tinyproxy

En el mismo producto, de las más peligrosas a las menos.

CVE-2026-3945HIGHtinyproxy Integer Overflow in HTTP Chunked Transfer-Encoding Parser Leading to Denial of ServiceEPSS 0.6%CVE-2026-54387CRITICALTinyproxy - HTTP Request Smuggling via CL/TE DesynchronizationEPSS 0.4%CVE-2026-55202HIGHTinyproxy - Stathost Detection Bypass via Host Header ManipulationEPSS 0.4%CVE-2026-125371MEDIUMTinyproxy through 1.11.3 Hostname ACL Allow-List Bypass via Suffix MatchEPSS —