CVE-2026-47069
5.3 MEDIUMImproper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in benoitc hackney allows HTTP Response Splitting
Published: 2026-05-25 · Last updated: 2026-05-27
Severity and scoring
- CVSS
- 5.3 MEDIUM
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CWE
- CWE-93
Affected products
| Vendor | Product |
|---|---|
| benoitc | hackney |
Description
Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in benoitc hackney allows HTTP Response Splitting. The hackney_cookie:setcookie/3 function in src/hackney_cookie.erl validates the Name and Value arguments against CRLF and control characters, but concatenates the domain and path options verbatim into the output iolist with no equivalent check. An attacker who controls either option — for example by supplying a Host header value forwarded as the cookie domain, or a request path forwarded as the cookie path — can inject a literal CRLF sequence and arbitrary additional Set-Cookie headers into the HTTP response. This issue affects hackney: from 0.9.0 before 4.0.1.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-47069
- [Patch]https://cna.erlef.org/cves/CVE-2026-47069.html
- [Patch]https://github.com/benoitc/hackney/commit/8e02b99c28aea1b3fa2ddc0e66f51fe5bb0ac540
- [Patch]https://github.com/benoitc/hackney/security/advisories/GHSA-mp55-p8c9-rfw2
- [Patch]https://osv.dev/vulnerability/EEF-CVE-2026-47069
- [Patch]https://github.com/benoitc/hackney/security/advisories/GHSA-mp55-p8c9-rfw2
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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