CVE-2025-59822
MEDIUM EPSS 26.8%
Published Sep 23, 20259mo ago · Modified Jun 17, 20262w ago
6.3 CVSS 4.0
Published Sep 23, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
26.8% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available
Weaknesses 1
CWE-444
Affected Products 45
| Vendor | Product | Version | Range |
|---|---|---|---|
| typelevel | http4s | * | <0.23.31 |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
| typelevel | http4s | 1.0.0 | any |
References 2
- github.com https://github.com/http4s/http4s/commit/dd518f7c967e5165813b8d4a48a82b8fab852d41
- github.com https://github.com/http4s/http4s/security/advisories/GHSA-wcwh-7gfw-5wrr
Remediation
- github.com https://github.com/http4s/http4s/commit/dd518f7c967e5165813b8d4a48a82b8fab852d41