Vulnerability Description
openssl_encrypt versions before 1.4.6 contain a key derivation flaw in sequential XOR composition mode where the last stage cancels out during key generation. When configured with a single KDF and no prior hashing stage, attackers can bypass memory-hard key derivation and perform offline password cracking at SHA-256 speed instead of the configured KDF cost.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Jahlives | Openssl Encrypt | < 1.4.6 |
Related Weaknesses (CWE)
References
- https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-vxf9-vwp6-2MitigationVendor Advisory
- https://www.vulncheck.com/advisories/openssl-encrypt-before-kdf-bypass-via-sequeThird Party Advisory
FAQ
What is CVE-2026-74871?
CVE-2026-74871 is a vulnerability with a CVSS score of 6.2 (MEDIUM). openssl_encrypt versions before 1.4.6 contain a key derivation flaw in sequential XOR composition mode where the last stage cancels out during key generation. When configured with a single KDF and no ...
How severe is CVE-2026-74871?
CVE-2026-74871 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-74871?
Check the references section above for vendor advisories and patch information. Affected products include: Jahlives Openssl Encrypt.