HTTP Request Smuggling Affecting trafficserver package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ECHOLATEST-TRAFFICSERVER-21429704
- published22 Oct 2026
- disclosed21 Oct 2026
Introduced: 21 Oct 2026
NewCVE-2025-31699 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest trafficserver.
NVD Description
Note: Versions mentioned in the description apply only to the upstream trafficserver package and not the trafficserver package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
Apache Traffic Server can return an origin connection to the shared pool while the origin is still waiting on a request body the client declared but never fully sent, including when the client used Expect: 100-continue. The origin then reads a later request on that connection as leftover body data, which lets an attacker smuggle requests past ATS access controls, disrupt other users' requests, or poison the cache.
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.