HOMEVULNERABILITIESCVE-2026-47071
HIGH

CVE-2026-47071

CWE-400Published: May 25, 2026· Updated: May 27, 2026

7.5
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:13.0th

Official 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.

NVD Source

Technical Analysis

CVE-2026-47071 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

benoitc1 product
hackney
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://cna.erlef.org/cves/CVE-2026-47071.html
PATCHhttps://github.com/benoitc/hackney/commit/5ccdab725c561a6f03d05a51f2d0664f98236dae
PATCHhttps://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxr
PATCHhttps://osv.dev/vulnerability/EEF-CVE-2026-47071
PATCHhttps://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxr

All References (5)

→
https://cna.erlef.org/cves/CVE-2026-47071.htmlThird Party Advisory · Patch
→
https://github.com/benoitc/hackney/commit/5ccdab725c561a6f03d05a51f2d0664f98236daePatch
→
https://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxrExploit · Patch · Vendor Advisory
→
https://osv.dev/vulnerability/EEF-CVE-2026-47071Third Party Advisory · Patch
→
https://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxrExploit · Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2026-47071
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-400
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMay 25, 2026

Related CVEs (CWE-400)

CVE-2026-30141
9.8
CVE-2026-8856
9.1
CVE-2026-7790
8.7
CVE-2026-45169
8.7
CVE-2025-32424
8.7
CVE-2026-33155
8.7

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-47071 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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