Denial of Service Vulnerability in OpenSSL Encrypt Product by OpenSSL
CVE-2026-81720

6.9MEDIUM

Key Information:

Vendor

Jahlives

Status
OpenSSL Encrypt
Vendor
CVE Published:
27 August 2026

What is CVE-2026-81720?

The OpenSSL Encrypt product prior to version 1.4.9 contains a vulnerability that fails to properly validate the memory_cost parameter in identity file protection blocks. This flaw enables attackers with write access to local identity stores to craft malicious identity files containing excessively high memory_cost values. Consequently, when an affected system attempts to unlock these identities before authentication, it may experience out-of-memory conditions, resulting in crashes and disrupting service availability.

Affected Version(s)

openssl_encrypt 0 < 1.4.9

openssl_encrypt 1.4.9

References

https://github.com/jahlives/openssl_encrypt/security/advi...
vendor-advisory
https://www.vulncheck.com/advisories/openssl-encrypt-befo...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.