CVE-2026-111811 Apache Traffic Server - Unrestricted File Upload

Apache Traffic Server 8.0.0 to 8.1.11, 9.0.0 to 9.2.15, 10.0.0 to 10.1.4, and 10.2.0 contains an unrestricted file upload vulnerability in the experimental tsmemcache plugin, letting unauthenticated attackers read, write, and delete shared proxy cache data remotely, exploit requires network access.

CVSS base score 9.0 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Unrestricted File Upload
Impact
File System Read, File System Write, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-306

Vendor fix

Upgrade to versions 9.2.16, 10.1.5, or 10.2.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs