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CVE-2026-47072

Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in benoitc hackney allows HTTP Request/Response Splitting. The WebSocket upgrade code in src/hackney_ws.erl copies the host, path, headers (ExtraHeaders), and protocols options from the caller-supplied opts map into the internal #ws_data{} record in init/1 and then splices them verbatim into the raw HTTP/1.1 upgrade request by binary concatenation in do_handshake/1. No CRLF or NUL stripping is performed at any of these fo
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3538afc67a04f6f3597703c205598b06a28b2fb8b9fba826cb5ce1fc4ddca70c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["hackney_ws"],"packageName":"benoitc/hackney","packageURL":"pkg:github/benoitc/hackney","product":"hackney","programFiles":["src/hackney_ws.erl"],"programRoutines":[{"name":"hackney_ws:do_handshake/1"},{"name":"hackney_ws:init/1"}],"repo":"https://github.com/benoitc/hackney","vendor":"benoitc","versions":[{"lessThan":"52310ca807e7b48441ba0e9129171f535313fdd1","status":"affected","version":"690cecaf236fba49526da404a5bc889a24367a3e","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/cna/affected/1

{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["hackney_ws"],"packageName":"hackney","packageURL":"pkg:hex/hackney","product":"hackney","programFiles":["src/hackney_ws.erl"],"programRoutines":[{"name":"hackney_ws:do_handshake/1"},{"name":"hackney_ws:init/1"}],"repo":"https://github.com/benoitc/hackney","vendor":"benoitc","versions":[{"lessThan":"4.0.1","status":"affected","version":"2.0.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["hackney_ws"],"packageName":"benoitc/hackney","packageURL":"pkg:github/benoitc/hackney","product":"hackney","programFiles":["src/hackney_ws.erl"],"programRoutines":[{"name":"hackney_ws:do_handshake/1"},{"name":"hackney_ws:init/1"}],"repo":"https://github.com/benoitc/hackney","vendor":"benoitc","versions":[{"lessThan":"52310ca807e7b48441ba0e9129171f535313fdd1","status":"affected","version":"690cecaf236fba49526da404a5bc889a24367a3e","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/cna/affected/1
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["hackney_ws"],"packageName":"hackney","packageURL":"pkg:hex/hackney","product":"hackney","programFiles":["src/hackney_ws.erl"],"programRoutines":[{"name":"hackney_ws:do_handshake/1"},{"name":"hackney_ws:init/1"}],"repo":"https://github.com/benoitc/hackney","vendor":"benoitc","versions":[{"lessThan":"4.0.1","status":"affected","version":"2.0.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-93","description":"CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-47072.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/benoitc/hackney/commit/52310ca807e7b48441ba0e9129171f535313fdd1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/cna/references/3
{"tags":["vendor-advisory","related"],"url":"https://github.com/benoitc/hackney/security/advisories/GHSA-f9vr-g2g2-x9fg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/benoitc/hackney/security/advisories/GHSA-f9vr-g2g2-x9fg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/adp/0/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-47072"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef503599d99b26df049bcd35a387211ea630ef6e8dc4b4c81b30d4eea7e639da · sha256:8f1e6daf46bfadfc… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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