All vulnerabilities

Servers and applications

CVE-2016-5420

curl and libcurl before 7.50.1 do not check the client certificate when choosing the TLS connection to reuse, which might allow remote attackers to hijack the authentication of the connection by leveraging a previously created connection with a different client certificate.

Severity
High 7.5
Published
10 Aug 2016
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
curlServers and applications · cpe:a:haxx:libcurl
  • Every version up to 7.50.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-5420
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-5420