CVE-2026-74871openssl_encrypt before 1.4.6 KDF Bypass via Sequential-XOR
Updated under an hour ago ()
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It affects jahlives openssl_encrypt. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 6.2 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-916
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
jahlives openssl_encrypt jahlives:openssl_encrypt (from the name) | before 1.4.6; 1.4.6 not affected | CNA record |
jahlives openssl_encrypt jahlives:openssl_encrypt | before 1.4.6 | NVD |
References
- https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-vxf9-vwp6-2w43vendor-advisory, mitigation
- https://www.vulncheck.com/advisories/openssl-encrypt-before-kdf-bypass-via-sequential-xorthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.