CVE-2026-111805 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 truncated HTTP/2 Content-Length value exhaustion of HTTP/1.1 origin's worker pool, letting attackers exhaust server resources, exploit requires crafted HTTP/2 requests.

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-400

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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