CVE-2026-74888
openssl_encrypt before 1.4.0 Non-Standard PBKDF2 Key Derivation
- State
- Published
- Severity
- 8.7 High
- Published
- Aug 17, 2026
- Updated
- Oct 1, 2026
- Reserved
- Aug 17, 2026
Description
openssl_encrypt versions before 1.4.0 use a non-standard PBKDF2 key derivation construction with iterations=1 per call in an outer loop, creating a KDF whose security properties have not been formally analyzed. Attackers can exploit this weakened key derivation to more efficiently crack passwords protecting legacy encrypted files compared to standard PBKDF2 implementations.
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-327 Use of a Broken or Risky Cryptographic Algorithm
Affected Products
| Product | Versions |
|---|---|
openssl_encryptjahlives |
|
References
- GitHub Security Advisory (GHSA-743f-89fg-x288)vendor-advisory
- VulnCheck Advisory: openssl_encrypt before 1.4.0 Non-Standard PBKDF2 Key Derivationthird-party-advisory
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