Bug 2562331

Summary: CVE-2025-55702 trafficserver: Apache Traffic Server: HTTP request smuggling via unread POST request body [fedora-all]
Product: [Fedora] Fedora Reporter: Oleg Sushchenko <osushche>
Component: trafficserverAssignee: Jered Floyd (Fedora) <jered>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: jered
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["667aa9cd-9477-4360-afe2-76784e4d1c0f"]}
Fixed In Version: trafficserver-10.2.1-1.fc45 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-10-31 18:49:41 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:
Bug Depends On:    
Bug Blocks: 2558464    

Description Oleg Sushchenko 2026-10-27 18:58:18 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.

When a client sends a POST with Expect: 100-continue and the origin answers before reading the body, Apache Traffic Server parses the unread body left on the client connection as the next request. An attacker behind a front-end proxy that shares connections to Traffic Server can use this to smuggle requests past the front end and desynchronize responses for other users.



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.
Comment 1 Fedora Update System 2026-10-28 01:54:39 UTC 
FEDORA-2026-84f58bb437 (trafficserver-10.2.1-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-84f58bb437
Comment 2 Fedora Update System 2026-10-31 18:49:41 UTC 
FEDORA-2026-84f58bb437 (trafficserver-10.2.1-1.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.