Http4s is a Scala interface for HTTP services. In versions from 1.0.0-M1 to before 1.0.0-M45 and before 0.23.31, http4s is vulnerable to HTTP Request Smuggling due to improper handling of HTTP trailer section. This vulnerability could enable attackers to bypass front-end servers security controls, launch targeted attacks against active users, and poison web caches. A pre-requisite for exploitation involves the web application being deployed behind a reverse-proxy that forwards trailer headers. This issue has been patched in versions 1.0.0-M45 and 0.23.31.
Metrics
Affected Vendors & Products
References
History
Wed, 08 Oct 2025 17:45:00 +0000
Type | Values Removed | Values Added |
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First Time appeared |
Typelevel
Typelevel http4s |
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CPEs | cpe:2.3:a:typelevel:http4s:*:*:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone10:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone11:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone12:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone13:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone14:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone15:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone16:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone17:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone18:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone19:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone1:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone20:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone21:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone22:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone23:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone24:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone25:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone26:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone27:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone28:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone29:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone2:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone30:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone31:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone32:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone33:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone34:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone35:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone36:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone37:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone38:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone39:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone3:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone40:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone41:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone42:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone43:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone44:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone4:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone5:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone6:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone7:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone8:*:*:*:*:*:* cpe:2.3:a:typelevel:http4s:1.0.0:milestone9:*:*:*:*:*:* |
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Vendors & Products |
Typelevel
Typelevel http4s |
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Metrics |
cvssV3_1
|
Thu, 25 Sep 2025 08:30:00 +0000
Type | Values Removed | Values Added |
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First Time appeared |
Http4s
Http4s http4s |
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Vendors & Products |
Http4s
Http4s http4s |
Tue, 23 Sep 2025 20:15:00 +0000
Type | Values Removed | Values Added |
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Metrics |
ssvc
|
Tue, 23 Sep 2025 19:00:00 +0000
Type | Values Removed | Values Added |
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Description | Http4s is a Scala interface for HTTP services. In versions from 1.0.0-M1 to before 1.0.0-M45 and before 0.23.31, http4s is vulnerable to HTTP Request Smuggling due to improper handling of HTTP trailer section. This vulnerability could enable attackers to bypass front-end servers security controls, launch targeted attacks against active users, and poison web caches. A pre-requisite for exploitation involves the web application being deployed behind a reverse-proxy that forwards trailer headers. This issue has been patched in versions 1.0.0-M45 and 0.23.31. | |
Title | Http4s vulnerable to HTTP Request Smuggling due to improper handling of HTTP trailer section | |
Weaknesses | CWE-444 | |
References |
| |
Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2025-09-23T18:54:42.867Z
Updated: 2025-09-23T19:17:26.320Z
Reserved: 2025-09-22T14:34:03.470Z
Link: CVE-2025-59822

Updated: 2025-09-23T19:15:06.063Z

Status : Analyzed
Published: 2025-09-23T19:15:42.303
Modified: 2025-10-08T17:35:04.200
Link: CVE-2025-59822

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