CVE-2026-81699 — openssl_encrypt before 1.4.9 Denial of Service via unbounded KDF cost
openssl_encrypt versions before 1.4.9 fail to properly validate key derivation function costs in crafted files, allowing attackers to trigger unbounded memory and CPU exhaustion…
Published: 2026-08-27 · CVSS: 8.7 · CVSS 4.0
openssl_encrypt versions before 1.4.9 fail to properly validate key derivation function costs in crafted files, allowing attackers to trigger unbounded memory and CPU exhaustion during pre-authentication processing. Attackers can supply malicious files with excessive KDF parameters to exhaust system resources and crash or wedge the process before password verification occurs.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7