CVE-2026-74900Critical· 9.8▾ Midnightopenssl_encrypt versions before 1.4.0 contain a critical vulnerability in pqc.py where KEM decapsulation failures silently fall back to simulation mode, generating a deterministic shared secret from only 16 bytes of the private key and p…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · 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 2.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.3%
0.3% → 0.6%
Last analysed / modified upstream
— → 9.8
none → critical
openssl_encrypt versions before 1.4.0 contain a critical vulnerability in pqc.py where KEM decapsulation failures silently fall back to simulation mode, generating a deterministic shared secret from only 16 bytes of the private key and publicly available encapsulated key data. Attackers who obtain 16 bytes of the private key can compute the shared secret and decrypt all ciphertext, as the fallback triggers on any KEM failure without raising an error.
openssl_encrypt < 1.4.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
openssl-encrypt < 1.4.0Patched in:
openssl-encrypt 1.4.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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
CVE-2026-81702Critical· 9.8openssl_encrypt before 1.4.9 Key Substitution via Identity Load
CVE-2026-74871Medium· 6.2openssl_encrypt versions before 1.4.6 contain a key derivation flaw in sequential XOR composition mode where the last stage cancels out during key generation