CVE-2026-81563: SVCB AliasMode additional-data error leaks qpcache references

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-21

Last Updated

2026-09-21

EPSS Score

0.48% (percentile: 40.4%)

Affected Products (1)

Other

• 21677-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-21: Information published.
• 2026-09-21: Information published.