CVE-2026-47071 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-47071HIGH

benoitc hackney — SOCKS5 TLS upgrade ignores caller timeout in hackney

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   P   N   N   N   N   H    8.2   .0075   52.2     —

AFFECTED
  Product  Versions                                    Fixed
  hackney  0.10.0 –                                    —
  hackney  34cdbd1d20a282aacc286a89327465a3925b4c5d –  —

TIMELINE
  May 18  Reserved by EEF
  May 25  EXPLOIT PUBLISHED — CVE-2026-47071 (benoitc hackney). Public exploit reference added.
  May 25  Published (CNA: EEF)

CWE-400 · CNA: EEF · CVSS v4.0 · 4 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 18, 2026	Reserved	Reserved by EEF
May 25, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-47071 (benoitc hackney). Public exploit reference added.
May 25, 2026	Published	Published (CNA: EEF)

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
benoitc	hackney	—	0.10.0	—
benoitc	hackney	—	34cdbd1d20a282aacc286a89327465a3925b4c5d	—

Weaknesses

CWE-400

References (4)

https://cna.erlef.org/cves/CVE-2026-47071.html [Patch, Third Party Advisory]
https://github.com/benoitc/hackney/commit/5ccdab725c561a6f03d05a51f2d0664f98236dae [Patch]
https://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxr [Exploit, Patch, Vendor Advisory]
https://osv.dev/vulnerability/EEF-CVE-2026-47071 [Patch, Third Party Advisory]

Authoritative record: CVE-2026-47071 at cve.org

Vendors: benoitc

Weaknesses: CWE-400

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-47071 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.