Tinyproxy through 1.11.3, fixed in commit ff45d3b, fails to reconcile conflicting Content-Length and Transfer-Encoding: chunked headers, forwarding both verbatim to the backend while using Content-Length to determine how many request body bytes to consume. Remote attackers can desynchronize the proxy and backend parser state, allowing injection of arbitrary HTTP requests to the backend to enable cache poisoning, access control bypass, and request hijacking.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Tinyproxy |
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References
History
Sat, 20 Jun 2026 00:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Thu, 18 Jun 2026 21:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Tinyproxy
Tinyproxy tinyproxy |
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| Vendors & Products |
Tinyproxy
Tinyproxy tinyproxy |
Thu, 18 Jun 2026 04:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Tinyproxy through 1.11.3, fixed in commit ff45d3b, fails to reconcile conflicting Content-Length and Transfer-Encoding: chunked headers, forwarding both verbatim to the backend while using Content-Length to determine how many request body bytes to consume. Remote attackers can desynchronize the proxy and backend parser state, allowing injection of arbitrary HTTP requests to the backend to enable cache poisoning, access control bypass, and request hijacking. | |
| Title | Tinyproxy - HTTP Request Smuggling via CL/TE Desynchronization | |
| Weaknesses | CWE-444 | |
| References |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-06-17T19:48:37.904Z
Updated: 2026-06-23T16:16:57.988Z
Reserved: 2026-06-12T20:20:02.950Z
Link: CVE-2026-54387
Vulnrichment
Updated: 2026-06-18T13:10:45.141Z
NVD
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Redhat
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