CVE-2026-111808 — Apache Traffic Server: HTTP/2 DATA frame padding underflow lets a client trigger backend worker-pool exhaustion

CVE-2026-111808

Apache Traffic Server: HTTP/2 DATA frame padding underflow lets a client trigger backend worker-pool exhaustion PUBLISHED

Description (CNA)

Apache Traffic Server can be used to exhaust an HTTP/1.1 origin's worker pool via a malformed padded HTTP/2 DATA frame. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0. Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache Traffic Server	affected 8.0.0 through 8.1.11; affected 9.0.0 through 9.2.15; affected 10.0.0 through 10.1.4; affected 10.2.0

CWE

CWE-191

References

https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.