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Servers and applications

CVE-2026-35191

Issue summary: The OpenSSL QUIC server, when configured to not preform address validation, can be forced to count incoming packets multiple times in its unvalidated credit computation, leading to a violation of the RFC 9000 unvalidated connection amplification limit of 3 times the amount of data received. Impact summary: A remote attacker able to spoof packets to a server using the OpenSSL QUIC…

Severity
Low 3.7
Published
29 Sept 2026
Last changed
8 Oct 2026
Added to UpHeron
21 Oct 2026
Fixed in
3.5.9, 3.6.5, 4.0.3
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • From 3.5.0 before 3.5.9
  • From 3.6.0 before 3.6.5
  • From 4.0.0 before 4.0.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-35191
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-35191