CVE-2026-81699

Description

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.

References

• github.com/jahlives/openssl_encrypt/security/advisories/GHSA-phmr-p567-q5g6 · Vendor Advisory
• www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-denial-of-service-via-unbounded-kdf-cost · Third Party Advisory