All vulnerabilities

Servers and applications

CVE-2026-2673

Issue summary: An OpenSSL TLS 1.3 server may fail to negotiate the expected preferred key exchange group when its key exchange group configuration includes the default by using the 'DEFAULT' keyword. Impact summary: A less preferred key exchange may be used even when a more preferred group is supported by both client and server, if the group was not included among the client's initial predicated…

Severity
Medium 6.5
Published
13 Mar 2026
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
3.5.6, 3.6.2
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • From 3.5.0 before 3.5.6
  • From 3.6.0 before 3.6.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-2673
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-2673