CVE-2026-111809
Critical · 9.3CVSS
9.3
EPSS
0.2%
Published
Oct 21, 2026
CISA due date
—
The record
Apache Traffic Server allows request smuggling via HEAD requests that carry Content-Length or Transfer-Encoding. 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
- CVE-2026-55613 uhttpd is a small HTTP server. CWE-444
- CVE-2026-55614 uhttpd is a small HTTP server. CWE-444
- CVE-2026-55612 uhttpd is a small HTTP server. CWE-444
- CVE-2026-116127 Starlet versions before 0.33 for Perl send a body in responses to HEAD requests… CWE-444
- CVE-2026-91920 A flaw was found in the ChunkReader component of the Undertow web server, which is used… CWE-444
- CVE-2026-118264 Echo is a Go web framework. CWE-444
- CVE-2026-103995 Response body and chunk parsing would handle non-hex or negative integers incorrectly… CWE-444
- CVE-2026-115823 Starman versions before 0.4019 for Perl send response bodies for HEAD requests… CWE-444