CVE-2026-45447

CVE-2026-45447

Issue summary: A specially crafted PKCS#7 or S/MIME signed message could trigger a use-after-free during PKCS#7 signature verification. Impact summary: A use-after-free may result in process crashes, heap corruption, or potentially remote…

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-45447?
CVE-2026-45447 is a high-severity vulnerability, classified under Use After Free. CVSS score: 8.8/10. Published 2026-06-09.
How severe is CVE-2026-45447?
High severity. CVSS v3 base score is 8.8 out of 10.