Resource Exhaustion Vulnerability in Apache Traffic Server
CVE-2026-111808

7.7HIGH

Key Information:

Vendor

Apache
Status
Apache Traffic Server
Vendor
CVE Published:
21 October 2026

What is CVE-2026-111808?

A resource exhaustion vulnerability exists in Apache Traffic Server that allows attackers to deplete an HTTP/1.1 origin's worker pool through a malformed padded HTTP/2 DATA frame. This can lead to significant service disruption, as it may prevent legitimate users from accessing the service effectively. It is crucial for users of affected versions to upgrade to at least version 9.2.16, 10.1.5, or 10.2.1 to mitigate this issue and enhance security.

Affected Version(s)

Apache Traffic Server 8.0.0 <= 8.1.11

Apache Traffic Server 9.0.0 <= 9.2.15

Apache Traffic Server 10.0.0 <= 10.1.4

References

https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb1...
vendor-advisory

CVSS V4

Score:
7.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Khalilov Moe (LeetProtect)
The ASF
.