8.7

CVE-2026-47067

Exploit

Atom table exhaustion via unrecognized URL schemes in hackney

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Benoitc ≫ Hackney Version >= 2.0.0 < 4.0.1
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.75% 0.512
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6b3ad84c-e1a6-4bf7-a703-f496b71e49db 8.7 0 0
CVSS:4.0/AV:N/AC:L/AT:N/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
CWE-770 Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

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