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.
Metrics
Affected Vendors & Products
References
History
Thu, 27 Aug 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | openssl_encrypt before 1.4.9 Plaintext Confirmation Oracle via SHA-256 | |
| Weaknesses | CWE-311 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-27T18:20:12.907Z
Reserved: 2026-08-27T11:12:00.889Z
Link: CVE-2026-81688
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Status : Received
Published: 2026-08-27T17:20:58.553
Modified: 2026-08-27T17:20:58.553
Link: CVE-2026-81688
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OpenCVE Enrichment
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