Vulnerability in Jahlives OpenSSL Encrypt
CVE-2026-81688
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-7c3q-gp4v-q29q) (vendor-advisory, Vendor Advisory)
- VulnCheck Advisory: openssl_encrypt before 1.4.9 Plaintext Confirmation Oracle via SHA-256 (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-81688?
- CVE-2026-81688 is a high-severity vulnerability in Jahlives OpenSSL Encrypt, classified under Missing Encryption of Sensitive Data. CVSS score: 7.5/10. Published 2026-08-27.
- How severe is CVE-2026-81688?
- High severity. CVSS v3 base score is 7.5 out of 10.