CVE-2026-47071
7.5 HIGHUncontrolled Resource Consumption 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-400
Affected products
| Vendor | Product |
|---|---|
| benoitc | hackney |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-47071
- [Patch]https://cna.erlef.org/cves/CVE-2026-47071.html
- [Patch]https://github.com/benoitc/hackney/commit/5ccdab725c561a6f03d05a51f2d0664f98236dae
- [Patch]https://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxr
- [Patch]https://osv.dev/vulnerability/EEF-CVE-2026-47071
- [Patch]https://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxr
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)
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