CVE-2025-55702 Apache Traffic Server - HTTP Request Smuggling

Apache Traffic Server 8.0.0 to 8.1.11, 9.0.0 to 9.2.15, 10.0.0 to 10.1.4, and 10.2.0 contains an HTTP request smuggling vulnerability caused by parsing unread client body as next request when origin responds early, letting attackers behind front-end proxies smuggle requests and desynchronize responses, exploit requires shared connections with front-end proxy.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
View the NVD record ↗

Details

Type
HTTP Request Smuggling
Impact
HTTP Request Smuggling
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-444

Vendor fix

Upgrade to versions 9.2.16, 10.1.5, or 10.2.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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