CVE-2026-47071

HIGH EPSS 48.6%
Published May 25, 20261mo ago · Modified Jun 17, 20261w ago
8.2 CVSS 4.0
High
Find Similar
Published May 25, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.2
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
48.6% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-400 Uncontrolled Resource Consumption Resource Mgmt

Affected Products 1

VendorProductVersionRange
benoitchackney*≥0.10.0  –  <4.0.1

References 4

  • cna.erlef.org https://cna.erlef.org/cves/CVE-2026-47071.html
    PatchThird Party Advisory
  • github.com https://github.com/benoitc/hackney/commit/5ccdab725c561a6f03d05a51f2d0664f98236dae
    Patch
  • github.com https://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxr
    ExploitPatchVendor Advisory
  • osv.dev https://osv.dev/vulnerability/EEF-CVE-2026-47071
    PatchThird Party Advisory

Remediation

  • cna.erlef.org https://cna.erlef.org/cves/CVE-2026-47071.html
    PatchThird Party Advisory
  • github.com https://github.com/benoitc/hackney/commit/5ccdab725c561a6f03d05a51f2d0664f98236dae
    Patch
  • github.com https://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxr
    ExploitPatchVendor Advisory
  • osv.dev https://osv.dev/vulnerability/EEF-CVE-2026-47071
    PatchThird Party Advisory