What is CVE-2026-81576?

CVE-2026-81576 is a high-severity vulnerability, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.7/10. Published 2026-08-27.

How severe is CVE-2026-81576?

High severity. CVSS v3 base score is 7.7 out of 10.

CVE-2026-81576

CVE-2026-81576

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak SID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read license information belonging to another handle.

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.003 (25.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

2fc02b1f-71e7-4514-a878-169626f68903 (vendor-advisory)

Frequently asked questions

What is CVE-2026-81576?: CVE-2026-81576 is a high-severity vulnerability, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.7/10. Published 2026-08-27.
How severe is CVE-2026-81576?: High severity. CVSS v3 base score is 7.7 out of 10.