Bug 2558481 (CVE-2026-111816) - CVE-2026-111816 trafficserver: Apache Traffic Server: A malformed 302 response bypasses parse-error rejection through the Transfer-Encoding: chunked carve-out
Summary: CVE-2026-111816 trafficserver: Apache Traffic Server: A malformed 302 respons...
Keywords:
Status: NEW
Alias: CVE-2026-111816
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-21 18:52 UTC by OSIDB Bzimport
Modified: 2026-11-01 21:05 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-10-21 18:52:35 UTC 
Apache Traffic Server forwarded a malformed 302 response that should have been rejected as a parse error, because the Transfer-Encoding: chunked carve-out bypassed the rejection path. A response that two peers can read differently is then stored and served, allowing cache poisoning and response-framing desync.



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.
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