Http4s vulnerable to HTTP Request Smuggling due to improper handling of HTTP trailer section
Summary
| CVE | CVE-2025-59822 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-09-23 19:15:42 UTC |
| Updated | 2026-10-19 16:10:00 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 6.3 MEDIUM from [email protected]
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
Problem Types: CWE-444 | CWE-444 CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 6.3 | MEDIUM | 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/C... |
| 4.0 | CNA | DECLARED | 6.3 | MEDIUM | 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 |
| 3.1 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
PresentPrivileges Required
NoneUser Interaction
NoneConfidentiality
NoneIntegrity
LowAvailability
NoneSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS: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
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
HighAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Typelevel | Http4s | All | All | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone1 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone10 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone11 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone12 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone13 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone14 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone15 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone16 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone17 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone18 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone19 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone2 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone20 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone21 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone22 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone23 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone24 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone25 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone26 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone27 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone28 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone29 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone3 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone30 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone31 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone32 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone33 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone34 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone35 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone36 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone37 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone38 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone39 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone4 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone40 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone41 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone42 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone43 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone44 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone5 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone6 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone7 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone8 | All | All |
| Application | Typelevel | Http4s | 1.0.0 | milestone9 | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/http4s/http4s/security/advisories/GHSA-wcwh-7gfw-5wrr | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | github.com | Exploit, Vendor Advisory |
| github.com/http4s/http4s/commit/dd518f7c967e5165813b8d4a48a82b8fab852d41 | [email protected] | github.com | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.