CVE-2026-58055: fallo de gravedad media en nghttp2
nghttp2 nghttpx - HTTP Request/Response Smuggling via Upgrade Request with Content-Length
Publicada el · Actualizada el
33Vexday Risk Score
Sin señal de explotación. Ella tiene prueba de concepto pública.
ssvc Attendcvss 6.3epss 0.3%
probabilidad de explotación
0.3%top 77% de las CVE
explotación observada
noninguna fuente lo reporta
1 exploit(s) público(s)
nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content-Length header and body onto reusable keep-alive backend connections, re-adding the Upgrade and Connection headers while passing Content-Length verbatim. A backend that resolves the resulting ambiguous message in the attacker's favor enables HTTP request/response smuggling and cross-client response-queue poisoning.
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N
Productos afectados
nghttp2 · nghttp2PoCs públicas encontradas — 1
cve_referencegithub.com/bikini/exploitarium/tree/main/nghttp2-nghttpx-upgrade-queue-poison-pocno verificado⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.
CVEs relacionadas — nghttp2
En el mismo producto, de las más peligrosas a las menos.
CVE-2024-28182MEDIUMReading unbounded number of HTTP/2 CONTINUATION frames to cause excessive CPU usageEPSS 85.0%CVE-2020-11080LOWDenial of service in nghttp2EPSS 5.3%CVE-2026-27135HIGHnghttp2 Denial of service: Assertion failure due to the missing state validationEPSS 0.9%CVE-2016-1544—CVE-2016-1544EPSS 0.9%
Referencias
https://github.com/bikini/exploitarium/tree/main/nghttp2-nghttpx-upgrade-queue-poison-pochttps://github.com/nghttp2/nghttp2/commit/ab28105c4a0197da24f8bfc414bc116055249e1ehttps://www.vulncheck.com/advisories/nghttp2-nghttpx-http-request-response-smuggling-via-upgrade-request-with-content-length