What is CVE-2026-81721?

CVE-2026-81721 is a high-severity vulnerability in Jahlives OpenSSL Encrypt, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-08-27.

How severe is CVE-2026-81721?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Jahlives OpenSSL Encrypt

CVE-2026-81721

openssl_encrypt before 1.4.9 fails to validate KDF cost parameters in encrypted file metadata and keystore headers, allowing attackers to trigger unbounded memory allocation. Attackers can craft malicious encrypted files declaring arbitrarily large Argon2, scrypt, or balloon KDF parameters to exhaust system memory and crash the process without authentication.

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Jahlives Openssl_encrypt

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-81721?: CVE-2026-81721 is a high-severity vulnerability in Jahlives OpenSSL Encrypt, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-08-27.
How severe is CVE-2026-81721?: High severity. CVSS v3 base score is 7.5 out of 10.