Bug 2508354 (CVE-2026-65100) - CVE-2026-65100 Apache Traffic Server: HPACK encoder desynchronizes from the decoder after a failed header encode
Summary: CVE-2026-65100 Apache Traffic Server: HPACK encoder desynchronizes from the d...
Keywords:
Status: NEW
Alias: CVE-2026-65100
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2508543 2508544
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-29 10:02 UTC by OSIDB Bzimport
Modified: 2026-08-10 19:38 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-07-29 10:02:16 UTC 
Apache Traffic Server updates the HTTP/2 HPACK dynamic table before confirming the header block encoded successfully, so an encode failure leaves the encoder out of sync with the peer decoder and corrupts subsequent header blocks on the connection.

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.
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