CVE-2025-55702
High · 8.7CVSS
8.7
EPSS
0.3%
Published
Oct 21, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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Related vulnerabilities
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- CVE-2026-115823 Starman versions before 0.4019 for Perl send response bodies for HEAD requests… CWE-444