All vulnerabilities

Servers and applications

CVE-2026-11564

libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. An easy handle that first uses default native CA trust can continue trusting the native platform store after the application switches that same handle to custom CA material for a later transfer.

Severity
Critical 9.1
Published
3 Jul 2026
Last changed
15 Sept 2026
Added to UpHeron
21 Oct 2026
Fixed in
8.21.0
Sources
NVD

Affected software

SoftwareAffected versions
curlServers and applications · cpe:a:haxx:curl
  • From 8.17.0 before 8.21.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-11564
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-11564