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Servers and applications

CVE-2026-34181

Issue Summary: The PKCS#12 file processing fails to perform sufficient input validation for files that use Password-Based Message Authentication Code 1 (PBMAC1) integrity mechanism allowing a certificate and private key forgery. Impact Summary: An attacker impersonating a user can cause a service reading PKCS#12 files to accept forged certificates and private keys with a 1 in 256 probability. If…

Severity
High 7.4
Published
9 Jun 2026
Last changed
23 Jul 2026
Added to UpHeron
21 Oct 2026
Fixed in
3.4.6, 3.5.7, 3.6.3
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • From 3.4.0 before 3.4.6
  • From 3.5.0 before 3.5.7
  • From 3.6.0 before 3.6.3
  • Version 4.0.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-34181
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-34181