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Servers and applications

CVE-2026-63073

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to `ERR_raise_data()`. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate whose subject becomes the default expected sender. CWE: CWE-134 (Use of Externally-Controlled…

Severity
Critical 9.8
Published
25 Aug 2026
Last changed
11 Sept 2026
Added to UpHeron
21 Oct 2026
Fixed in
3.4.7, 3.5.8, 3.6.4, 4.0.2
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • From 3.4.0 before 3.4.7
  • From 3.5.0 before 3.5.8
  • From 3.6.0 before 3.6.4
  • From 4.0.0 before 4.0.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-63073
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-63073