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CVE-2026-74871 Details
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.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 17, 2026Exploitation: NoneAutomatable: NoTechnical Impact: Partial
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-vxf9-vwp6-2w43 | [email protected] | MitigationVendor Advisory |
| https://www.vulncheck.com/advisories/openssl-encrypt-before-kdf-bypass-via-sequential-xor | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-916 | Use of Password Hash With Insufficient Computational Effort | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| jahlives openssl encrypt | < 1.4.6 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 10, 2026 | Initial Analysis | [email protected] |
| Aug 17, 2026 | CVE Modified | CISA-ADP |
| Aug 17, 2026 | New CVE Received | [email protected] |