Bug 2508382

Summary: CVE-2026-33930 trafficserver: Apache Traffic Server: Denial of Service via over-long Host header [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Oleg Sushchenko <osushche>
Component: trafficserverAssignee: Jered Floyd <jered>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: epel10CC: jered
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["7b766c96-d07f-41f5-8c45-4f908566adac"]}
Fixed In Version: trafficserver-9.2.15-1.el9 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-08-06 00:32:56 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Oleg Sushchenko 2026-07-29 12:26:24 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Apache Traffic Server copies the client Host header into a fixed-size stack buffer without a bound during redirect handling, so an over-long Host header overflows the stack when redirect following is enabled.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
Comment 1 Fedora Update System 2026-07-29 23:06:28 UTC 
FEDORA-EPEL-2026-943e511d48 (trafficserver-9.2.15-1.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-943e511d48
Comment 2 Fedora Update System 2026-08-06 00:32:56 UTC 
FEDORA-EPEL-2026-943e511d48 (trafficserver-9.2.15-1.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.