CVE-2026-47067

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-47067
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.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

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

Configuration 1 (hide)

cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*
History

27 May 2026, 13:52

Type Values Removed Values Added
References () https://cna.erlef.org/cves/CVE-2026-47067.html - () https://cna.erlef.org/cves/CVE-2026-47067.html - Third Party Advisory, Patch
References () https://github.com/benoitc/hackney/commit/31f6f0e27e096ad88743dfded4f030a3ee74972e - () https://github.com/benoitc/hackney/commit/31f6f0e27e096ad88743dfded4f030a3ee74972e - Patch
References () https://github.com/benoitc/hackney/security/advisories/GHSA-9653-rcfr-5c62 - () https://github.com/benoitc/hackney/security/advisories/GHSA-9653-rcfr-5c62 - Exploit, Vendor Advisory, Patch
References () https://osv.dev/vulnerability/EEF-CVE-2026-47067 - () https://osv.dev/vulnerability/EEF-CVE-2026-47067 - Third Party Advisory, Patch
First Time Benoitc
Benoitc hackney
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5
CPE cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*

26 May 2026, 17:16

Type Values Removed Values Added
References () https://github.com/benoitc/hackney/security/advisories/GHSA-9653-rcfr-5c62 - () https://github.com/benoitc/hackney/security/advisories/GHSA-9653-rcfr-5c62 -

25 May 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-25 15:16

Updated : 2026-05-27 13:52

NVD link : CVE-2026-47067

Mitre link : CVE-2026-47067

CVE.ORG link : CVE-2026-47067

JSON object : View

Products Affected

benoitc

  • hackney
CWE
CWE-770

Allocation of Resources Without Limits or Throttling