Fabio is an HTTP(S) and TCP router for deploying applications managed by consul. Prior to version 1.6.6, Fabio allows clients to remove X-Forwarded headers (except X-Forwarded-For) due to a vulnerability in how it processes hop-by-hop headers. Fabio adds HTTP headers like X-Forwarded-Host and X-Forwarded-Port when routing requests to backend applications. Since the receiving application should trust these headers, allowing HTTP clients to remove or modify them creates potential security vulnerabilities. Some of these custom headers can be removed and, in certain cases, manipulated. The attack relies on the behavior that headers can be defined as hop-by-hop via the HTTP Connection header. This issue has been patched in version 1.6.6.
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Affected Vendors & Products
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History
Wed, 04 Jun 2025 20:15:00 +0000
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First Time appeared |
Fabiolb
Fabiolb fabio |
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CPEs | cpe:2.3:a:fabiolb:fabio:*:*:*:*:*:go:*:* | |
Vendors & Products |
Fabiolb
Fabiolb fabio |
Fri, 30 May 2025 13:15:00 +0000
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ssvc
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Fri, 30 May 2025 06:30:00 +0000
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Description | Fabio is an HTTP(S) and TCP router for deploying applications managed by consul. Prior to version 1.6.6, Fabio allows clients to remove X-Forwarded headers (except X-Forwarded-For) due to a vulnerability in how it processes hop-by-hop headers. Fabio adds HTTP headers like X-Forwarded-Host and X-Forwarded-Port when routing requests to backend applications. Since the receiving application should trust these headers, allowing HTTP clients to remove or modify them creates potential security vulnerabilities. Some of these custom headers can be removed and, in certain cases, manipulated. The attack relies on the behavior that headers can be defined as hop-by-hop via the HTTP Connection header. This issue has been patched in version 1.6.6. | |
Title | Fabio allows HTTP clients to manipulate custom headers it adds | |
Weaknesses | CWE-345 CWE-348 |
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References |
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Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2025-05-30T06:14:45.819Z
Updated: 2025-05-30T12:24:19.086Z
Reserved: 2025-05-27T20:14:34.294Z
Link: CVE-2025-48865

Updated: 2025-05-30T12:24:03.593Z

Status : Analyzed
Published: 2025-05-30T07:15:23.940
Modified: 2025-06-04T19:54:41.613
Link: CVE-2025-48865

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