{"containers":{"cna":{"affected":[{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["hackney_socks5"],"packageName":"hackney","packageURL":"pkg:hex/hackney","product":"hackney","programFiles":["src/hackney_socks5.erl"],"programRoutines":[{"name":"hackney_socks5:connect/4"}],"repo":"https://github.com/benoitc/hackney","vendor":"benoitc","versions":[{"lessThan":"4.0.1","status":"affected","version":"0.10.0","versionType":"semver"}]},{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["hackney_socks5"],"packageName":"benoitc/hackney","packageURL":"pkg:github/benoitc/hackney","product":"hackney","programFiles":["src/hackney_socks5.erl"],"programRoutines":[{"name":"hackney_socks5:connect/4"}],"repo":"https://github.com/benoitc/hackney","vendor":"benoitc","versions":[{"lessThan":"5ccdab725c561a6f03d05a51f2d0664f98236dae","status":"affected","version":"34cdbd1d20a282aacc286a89327465a3925b4c5d","versionType":"git"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*","versionEndExcluding":"4.0.1","versionStartIncluding":"0.10.0","vulnerable":true}],"negate":false,"operator":"AND"}],"operator":"AND"}],"credits":[{"lang":"en","type":"finder","value":"Peter Ullrich"},{"lang":"en","type":"remediation developer","value":"Benoit Chesneau"},{"lang":"en","type":"analyst","value":"Jonatan Männchen"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Uncontrolled Resource Consumption vulnerability in benoitc hackney allows Flooding.<p>The SOCKS5 transport in <tt>src/hackney_socks5.erl</tt> correctly applies the caller-supplied timeout to the SOCKS5 negotiation phase, but then upgrades the connection to TLS using the two-argument form <tt>ssl:connect/2</tt>, which defaults to an infinite timeout. The <tt>Timeout</tt> 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 <tt>connect_timeout</tt> or <tt>recv_timeout</tt> options supplied by the caller.</p><p>This issue affects hackney: from 0.10.0 before 4.0.1.</p>"}],"value":"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.\n\nThis issue affects hackney: from 0.10.0 before 4.0.1."}],"impacts":[{"capecId":"CAPEC-130","descriptions":[{"lang":"en","value":"CAPEC-130 Excessive Allocation"}]}],"metrics":[{"cvssV4_0":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-05-25T14:00:41.112Z","orgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","shortName":"EEF"},"references":[{"tags":["vendor-advisory","related"],"url":"https://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxr"},{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-47071.html"},{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-47071"},{"tags":["patch"],"url":"https://github.com/benoitc/hackney/commit/5ccdab725c561a6f03d05a51f2d0664f98236dae"}],"source":{"discovery":"EXTERNAL"},"title":"SOCKS5 TLS upgrade ignores caller timeout in hackney","x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","assignerShortName":"EEF","cveId":"CVE-2026-47071","datePublished":"2026-05-25T14:00:41.112Z","dateReserved":"2026-05-18T17:28:08.322Z","dateUpdated":"2026-05-25T14:00:41.112Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"}