CVE-2026-81689
Last modified
CVE-2026-81689 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. openssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allowing identical keys across all users and files. Attackers with access to wrapped pepper blobs can precompute a single dictionary table and perform fleet-wide offline password guessing at hardware speed to recover user passwords.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.
Description
openssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allowing identical keys across all users and files. Attackers with access to wrapped pepper blobs can precompute a single dictionary table and perform fleet-wide offline password guessing at hardware speed to recover user passwords.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jahlives | Openssl Encrypt | < 1.4.9 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-81689?
How severe is CVE-2026-81689?
How do I fix CVE-2026-81689?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-81683openssl_encrypt (pip package openssl-encrypt) versions 1.4.8…5.5
- CVE-2026-81684In openssl_encrypt (pip package openssl-encrypt) versions <=…6.2
- CVE-2026-81685openssl_encrypt versions before 1.4.9 fail to sanitize recov…3.3
- CVE-2026-81686openssl_encrypt 1.4.x before 1.4.9 contains an optional D-Bu…5.5
- CVE-2026-81687openssl_encrypt versions before 1.4.9 fail to enforce a time…5.5
- CVE-2026-81688openssl_encrypt versions before 1.4.9 store an unkeyed SHA-2…7.5
- CVE-2026-8169ExtremeXOS (EXOS) uses a challenge-response mechanism to aut…8.7
- CVE-2026-81690openssl-encrypt (pip package) before 1.4.9 contains a symlin…7.3
- CVE-2026-81691openssl_encrypt versions before 1.4.9 fail to validate serve…7.5
- CVE-2026-81692openssl_encrypt (pip: openssl-encrypt) versions 1.4.8 and ea…7.5
- CVE-2026-81693openssl_encrypt before 1.4.9 fails to validate the total fie…7.5
- CVE-2026-81694openssl-encrypt (pip package, versions <= 1.4.8) fails to sa…3.3
Are you affected by CVE-2026-81689?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST