CVE-2026-47069

LOW EPSS 29.3%
Published May 25, 20261mo ago · Modified Jun 17, 20261w ago
2.1 CVSS 4.0
Low
Find Similar
Published May 25, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
2.1
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
29.3% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-93

Affected Products 1

VendorProductVersionRange
benoitchackney*≥0.9.0  –  <4.0.1

References 4

  • cna.erlef.org https://cna.erlef.org/cves/CVE-2026-47069.html
    PatchThird Party Advisory
  • github.com https://github.com/benoitc/hackney/commit/8e02b99c28aea1b3fa2ddc0e66f51fe5bb0ac540
    Patch
  • github.com https://github.com/benoitc/hackney/security/advisories/GHSA-mp55-p8c9-rfw2
    ExploitPatchVendor Advisory
  • osv.dev https://osv.dev/vulnerability/EEF-CVE-2026-47069
    PatchThird Party Advisory

Remediation

  • cna.erlef.org https://cna.erlef.org/cves/CVE-2026-47069.html
    PatchThird Party Advisory
  • github.com https://github.com/benoitc/hackney/commit/8e02b99c28aea1b3fa2ddc0e66f51fe5bb0ac540
    Patch
  • github.com https://github.com/benoitc/hackney/security/advisories/GHSA-mp55-p8c9-rfw2
    ExploitPatchVendor Advisory
  • osv.dev https://osv.dev/vulnerability/EEF-CVE-2026-47069
    PatchThird Party Advisory