CVE-2026-111817
Apache Traffic Server: Dropping chunked trailers stalls a passthrough transfer until timeout
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
Apache Traffic Server can stall a chunked transfer that it passes through with its trailers removed (proxy.config.http.drop_chunked_trailers) until the connection times out, because it waits for the trailer bytes it has already dropped. Trailer dropping is on by default in 10.x. In 8.1.11 and 9.2.x it is off by default, and those versions are affected only if it is enabled. This issue affects Apache Traffic Server: 8.1.11, from 9.2.5 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0. Users are recommended to upgrade to version 10.1.5 or 10.2.1, which fix the issue.
| CWE | CWE-400 |
| Vendor | apache software foundation |
| Product | apache traffic server |
| Published | Oct 21, 2026 |
Stay Ahead of the Next One
Get instant alerts for apache software foundation apache traffic server
Be the first to know when new medium vulnerabilities affecting apache software foundation apache traffic server are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
Apache Software Foundation / Apache Traffic Server
8.1.11 9.2.5 ≤ 9.2.15 10.0.0 ≤ 10.1.4 10.2.0
References
Credits
🔍 Omkhar Arasaratnam