VULNERABILITY INTELLIGENCE

CVE-2026-47071

CVSS score7.5 HIGH

EPSS probability0.75%

CISA KEVNot currently listed

Published2026-05-25

Last modified2026-07-24

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

Uncontrolled Resource Consumption vulnerability in benoitc hackney allows Flooding. The SOCKS5 transport in src/hackney_socks5.erl correctly applies the caller-supplied timeout to the SOCKS5 negotiation phase, but then upgrades the connection to TLS using the two-argument form ssl:connect/2, which defaults to an infinite timeout. The Timeout value is in scope at the call site but is not forwarded. A hostile SOCKS5 proxy that completes the SOCKS5 handshake normally and then goes silent (or sends a partial TLS ServerHello and stalls) will cause the connecting process to block indefinitely, regardless of the connect_timeout or recv_timeout options supplied by the caller. This issue affects hackney: from 0.10.0 before 4.0.1.

Weakness classification

6b3ad84c-e1a6-4bf7-a703-f496b71e49db: CWE-400

Primary references

6b3ad84c-e1a6-4bf7-a703-f496b71e49db — Patch, Third Party Advisory
6b3ad84c-e1a6-4bf7-a703-f496b71e49db — Patch
6b3ad84c-e1a6-4bf7-a703-f496b71e49db — Exploit, Patch, Vendor Advisory
6b3ad84c-e1a6-4bf7-a703-f496b71e49db — Patch, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0 — Exploit, Patch, Vendor Advisory