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Servers and applications

CVE-2026-1965

libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criterion must first be met. Due to a logical error in the code, a request that was issued by an…

Severity
Medium 6.5
Published
11 Mar 2026
Last changed
15 Sept 2026
Added to UpHeron
21 Oct 2026
Fixed in
8.19.0
Sources
NVD

Affected software

SoftwareAffected versions
curlServers and applications · cpe:a:haxx:curl
  • From 7.10.6 before 8.19.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-1965
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-1965