CVE-2026-81688
openssl_encrypt before 1.4.9 Plaintext Confirmation Oracle via SHA-256
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
openssl_encrypt versions before 1.4.9 store an unkeyed SHA-256 hash of the plaintext in the cleartext file header metadata. Attackers can read this hash without the password to confirm guessed plaintexts offline or fingerprint identical plaintexts across separately-encrypted files.
| CWE | CWE-311 |
| Vendor | jahlives |
| Product | openssl_encrypt |
| Published | Aug 27, 2026 |
| Last Updated | Aug 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
jahlives / openssl_encrypt
0 < 1.4.9