CVE-2025-59822 describes an HTTP Request Smuggling vulnerability in Http4s, a Scala HTTP services interface, affecting versions from 1.0.0-M1 to before 1.0.0-M45 and before 0.23.31. This flaw, categorized as CWE-444, stems from improper handling of HTTP trailer sections. With a CVSS score of 7.5 (HIGH), exploitation could lead to bypassing security controls, targeted user attacks, and web cache poisoning, requiring the application to be behind a reverse-proxy forwarding trailer headers. There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.23.31CPE matchmatch criteria | cpe:2.3:a:typelevel:http4s:*:*:*:*:*:*:*:* | ||
1.0.0CPE matchmatch criteria | cpe:2.3:a:typelevel:http4s:1.0.0:milestone1:*:*:*:*:*:* | ||
1.0.0CPE matchmatch criteria | cpe:2.3:a:typelevel:http4s:1.0.0:milestone10:*:*:*:*:*:* | ||
1.0.0CPE matchmatch criteria | cpe:2.3:a:typelevel:http4s:1.0.0:milestone11:*:*:*:*:*:* | ||
1.0.0CPE matchmatch criteria | cpe:2.3:a:typelevel:http4s:1.0.0:milestone12:*:*:*:*:*:* |
CVSS version used by this source: 4.0
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
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.