Use After Free Affecting openssl package, versions [1.0.2u,3.1.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-OPENSSL-17276937
- published10 Jun 2026
- disclosed9 Jun 2026
- creditThai Duong
Introduced: 9 Jun 2026
NewCVE-2026-45447 (opens in a new tab)How to fix?
Upgrade openssl to version 3.1.0 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in PKCS7_verify(). An attacker supplying a PKCS#7 or S/MIME signed message whose SignedData digestAlgorithms field is an empty ASN.1 SET can cause a caller-owned BIO to be freed during verification. A subsequent use of that BIO by the application can trigger a crash, heap corruption, or potentially remote code execution depending on allocator behavior and BIO usage. CMS APIs are not vulnerable.