CVE-2026-47067
7.5 HIGHAllocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding
Published: 2026-05-25 · Last updated: 2026-05-27
Severity and scoring
- CVSS
- 7.5 HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CWE
- CWE-770
Affected products
| Vendor | Product |
|---|---|
| benoitc | hackney |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-47067
- [Patch]https://cna.erlef.org/cves/CVE-2026-47067.html
- [Patch]https://github.com/benoitc/hackney/commit/31f6f0e27e096ad88743dfded4f030a3ee74972e
- [Patch]https://github.com/benoitc/hackney/security/advisories/GHSA-9653-rcfr-5c62
- [Patch]https://osv.dev/vulnerability/EEF-CVE-2026-47067
- [Patch]https://github.com/benoitc/hackney/security/advisories/GHSA-9653-rcfr-5c62
Related CVEs
Same vendor
- CVE-2026-47077 — Allocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding (7.5 HIGH)
- CVE-2026-47076 — Interpretation Conflict vulnerability in benoitc hackney allows Server Side Request Forgery (6.5 MEDIUM)
- CVE-2026-47075 — Improper Neutralization of CRLF Sequences vulnerability in benoitc hackney allows HTTP Request Splitting (7.5 HIGH)
- CVE-2026-47073 — Allocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding (7.5 HIGH)
- CVE-2026-47072 — Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in benoitc hackney allows HTTP Request/Response Splitting (7.5 HIGH)
Same CWE
- CVE-2026-48854 — Allocation of Resources Without Limits or Throttling vulnerability in elixir-grpc grpc allows unauthenticated attackers to exhaust the BE...
- CVE-2026-48853 — Deserialization of Untrusted Data and Allocation of Resources Without Limits or Throttling vulnerabilities in elixir-grpc grpc allow unau...
- CVE-2026-8683 — Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Mattermost Desktop App w... (6.5 MEDIUM)
- CVE-2026-53522 — Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool (6.5 MEDIUM)
- CVE-2026-50560 — Netty is a network application framework for development of protocol servers and clients (5.3 MEDIUM)