CVE-2026-111808 Apache Traffic Server - Denial of Service

Apache Traffic Server 8.0.0 through 8.1.11, 9.0.0 through 9.2.15, 10.0.0 through 10.1.4, and 10.2.0 contains a denial of service caused by malformed padded HTTP/2 DATA frames exhausting HTTP/1.1 origin worker pool, letting remote attackers cause service disruption, exploit requires network access.

CVSS base score 8.6 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-191

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

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