CVE-2025-59822

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/http4s/http4s/commit/dd518f7c967e5165813b8d4a48a82b8fab852d41
https://github.com/http4s/http4s/security/advisories/GHSA-wcwh-7gfw-5wrr
https://github.com/http4s/http4s/security/advisories/GHSA-wcwh-7gfw-5wrr

Configurations

No configuration.

History

23 Sep 2025, 20:15

Type	Values Removed	Values Added
References	~~() https://github.com/http4s/http4s/security/advisories/GHSA-wcwh-7gfw-5wrr -~~	() https://github.com/http4s/http4s/security/advisories/GHSA-wcwh-7gfw-5wrr -

23 Sep 2025, 19:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-09-23 19:15

Updated : 2025-09-24 18:11

NVD link : CVE-2025-59822

Mitre link : CVE-2025-59822

CVE.ORG link : CVE-2025-59822

JSON object : View

Products Affected

No product.

CWE

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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