CVE-2026-47067 — 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-2026-47067HIGH

benoitc hackney — Atom table exhaustion via unrecognized URL schemes in hackney

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   N   N   H    8.7   .0075   52.2     —

AFFECTED
  Product  Versions                                    Fixed
  hackney  2.0.0 –                                     —
  hackney  d9713695c0d99855d12c73fd8a0b4be0543950c4 –  —

TIMELINE
  May 18  Reserved by EEF
  May 25  EXPLOIT PUBLISHED — CVE-2026-47067 (benoitc hackney). Public exploit reference added.
  May 25  Published (CNA: EEF)

CWE-770 · CNA: EEF · CVSS v4.0 · 4 references · NVD status: Analyzed

Description

Allocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding. The URL parser in src/hackney_url.erl converts every unrecognized URL scheme to a permanent BEAM atom via binary_to_atom/2. BEAM atoms are never garbage-collected and the atom table defaults to a hard limit of 1,048,576 entries. An attacker who can supply URLs with attacker-chosen scheme prefixes — directly as request targets, as configured webhook URLs, or via Location headers followed during redirects — can exhaust the atom table and crash the entire BEAM VM with system_limit. This issue affects hackney: from 2.0.0 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-2026-47067 (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	—	2.0.0	—
benoitc	hackney	—	d9713695c0d99855d12c73fd8a0b4be0543950c4	—

Weaknesses

CWE-770

References (4)

https://cna.erlef.org/cves/CVE-2026-47067.html [Patch, Third Party Advisory]
https://github.com/benoitc/hackney/commit/31f6f0e27e096ad88743dfded4f030a3ee74972e [Patch]
https://github.com/benoitc/hackney/security/advisories/GHSA-9653-rcfr-5c62 [Exploit, Patch, Vendor Advisory]
https://osv.dev/vulnerability/EEF-CVE-2026-47067 [Patch, Third Party Advisory]

Authoritative record: CVE-2026-47067 at cve.org

Vendors: benoitc

Weaknesses: CWE-770

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-47067 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.