CVE-2026-81704
openssl_encrypt before 1.4.9 Weak Key Derivation via D-Bus
- State
- Published
- Severity
- 8.7 High
- Published
- Aug 27, 2026
- Updated
- Oct 1, 2026
- Reserved
- Aug 27, 2026
Description
openssl_encrypt versions before 1.4.9 contain a weak key derivation vulnerability in the D-Bus CryptoService.EncryptFile handler that uses unstretched SHA-256 instead of Argon2id. Attackers can perform offline password guessing against encrypted files roughly six to seven orders of magnitude faster than documented protection by exploiting the missing key stretching and hash rounds.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-916 Use of Password Hash With Insufficient Computational Effort
Affected Products
| Product | Versions |
|---|---|
openssl_encryptjahlives |
|
References
- GitHub Security Advisory (GHSA-v9r6-grch-fxw7)vendor-advisory
- VulnCheck Advisory: openssl_encrypt before 1.4.9 Weak Key Derivation via D-Busthird-party-advisory
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