CVE-2026-81721High· 7.5▾ Twilightopenssl_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 arbitr…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 3.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.4%
0.4% → 0.6%
Last analysed / modified upstream
— → 7.5
none → high
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.
openssl_encrypt < 1.4.9Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
openssl-encrypt < 1.4.9Patched in:
openssl-encrypt 1.4.9Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-81687Medium· 5.5openssl_encrypt versions before 1.4.9 fail to enforce a time ceiling on key derivation function iteration counts specified in file metadata
CVE-2026-81720Medium· 6.2openssl_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
CVE-2026-74870Low· 3.3openssl_encrypt before 1.4.8 Hardware Pepper Information Disclosure
CVE-2026-81680Medium· 4.0openssl_encrypt before 1.4.9 Authentication Bypass via Recovery Slot Removal
CVE-2026-81689High· 7.5openssl_encrypt before 1.4.9 Weak Pepper Key Derivation
CVE-2026-81694Low· 3.3verify-usb before 1.4.9 Output Injection via Unsanitized Filenames