CVE-2026-87743
Published:September 18, 2026
Updated:October 09, 2026
A flaw was found in Quarkus HTTP security. An unauthenticated attacker can exploit a discrepancy in how paths are normalized between the security matcher and HTTP request dispatchers. This allows the attacker to craft a URL that the security matcher considers public, but which is then routed to a protected endpoint, leading to an authorization bypass and potential unauthorized access to sensitive information.
Affected Packages
https://github.com/quarkusio/quarkus.git (GITHUB):
Affected version(s) =3.40.0.CR1 <3.40.0Fix Suggestion:
Update to version 3.40.0https://github.com/quarkusio/quarkus.git (GITHUB):
Affected version(s) >=3.33.2.1 <3.33.3.3Fix Suggestion:
Update to version 3.33.3.3https://github.com/quarkusio/quarkus.git (GITHUB):
Affected version(s) >=3.27.4.1 <3.27.5.3Fix Suggestion:
Update to version 3.27.5.3https://github.com/quarkusio/quarkus.git (GITHUB):
Affected version(s) >=3.39.0.CR1 <3.39.5Fix Suggestion:
Update to version 3.39.5io.quarkus:quarkus-vertx-http (JAVA):
Affected version(s) =3.40.0.CR1 <3.40.0Fix Suggestion:
Update to version 3.40.0io.quarkus:quarkus-vertx-http (JAVA):
Affected version(s) >=3.27.4.1 <3.27.5.3Fix Suggestion:
Update to version 3.27.5.3io.quarkus:quarkus-vertx-http (JAVA):
Affected version(s) >=3.33.2.1 <3.33.3.3Fix Suggestion:
Update to version 3.33.3.3io.quarkus:quarkus-vertx-http (JAVA):
Affected version(s) >=3.39.0 <3.39.5Fix Suggestion:
Update to version 3.39.5Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
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:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
EPSS
Base Score:
0.52