Resource exhaustion in Jahlives OpenSSL Encrypt
CVE-2026-81720
openssl_encrypt before 1.4.9 fails to validate the memory_cost parameter from identity file protection blocks, allowing attackers to trigger out-of-memory conditions during key derivation. Attackers with write access to local identity stores can craft malicious identity files with excessive memory_cost values that cause the host to crash when unlocking identities before authentication.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-783h-8q2f-f762) (vendor-advisory, Vendor Advisory)
- VulnCheck Advisory: openssl_encrypt before 1.4.9 Denial of Service via Unbounded Argon2 (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-81720?
- CVE-2026-81720 is a medium-severity vulnerability in Jahlives OpenSSL Encrypt, classified under Uncontrolled Resource Consumption. CVSS score: 6.2/10. Published 2026-08-27.
- How severe is CVE-2026-81720?
- Medium severity. CVSS v3 base score is 6.2 out of 10.