Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2026-69201
Published:September 15, 2026
Updated:September 22, 2026
Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, ResourceService and WebjarService decode each URL path segment but reject only segments exactly equal to an empty string, a dot, or two dots. A request containing percent-encoded slash or backslash separators can turn an accepted segment into a parent-directory traversal after decoding, allowing access to classpath or WebJar resources outside the configured base when a directory-backed classpath is served and the backend preserves the encoded separator. The patch rejects decoded segments containing slash or backslash in ResourceService and WebjarService, and applies the same guard to the non-exploitable FileService for consistency. This issue is fixed in versions 0.23.35 and 1.0.0-M47.
Affected Packages
https://github.com/http4s/http4s.git (GITHUB):
Affected version(s) >=v1.0.0-M1 <v1.0.0-M47
Fix Suggestion:
Update to version v1.0.0-M47
https://github.com/http4s/http4s.git (GITHUB):
Affected version(s) >=v0.22.0-M8 <v0.23.35
Fix Suggestion:
Update to version v0.23.35
org.http4s:http4s-server_2.12 (JAVA):
Affected version(s) >=0.10.0-M10 <0.23.35
Fix Suggestion:
Update to version 0.23.35
org.http4s:http4s-server_2.13 (JAVA):
Affected version(s) >=0.10.0-M10 <0.23.35
Fix Suggestion:
Update to version 0.23.35
org.http4s:http4s-server_2.13 (JAVA):
Affected version(s) >=1.0.0-M2 <1.0.0-M47
Fix Suggestion:
Update to version 1.0.0-M47
org.http4s:http4s-server_3 (JAVA):
Affected version(s) >=0.22.0-M8 <0.23.35
Fix Suggestion:
Update to version 0.23.35
org.http4s:http4s-server_3 (JAVA):
Affected version(s) >=1.0.0-M22 <1.0.0-M47
Fix Suggestion:
Update to version 1.0.0-M47
Do you need more information?
Contact Us
CVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
EPSS
Base Score:
0.63