CVE-2026-87743

Quarkus-vertx-http: authorization bypass via path normalization discrepancy in quarkus http security

HIGH
7.5
CVSS Score
Published: September 18, 2026 at 09:38 AM UTC
Updated: October 9, 2026 at 04:17 PM UTC
10 products affected across 1 vendorBuild of QuarkusBuild of KeycloakOpenShift AI

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
All versions
Vendor states this is fixed in 3 (unknown)
All versions
Vendor states this is fixed in 3 (unknown)
All versions
Vendor states this is fixed in 3 (unknown)
All versions
All versions
Vendor states this is fixed in 0 (unknown)
All versions
Vendor states this is fixed in 7 (unknown)
All versions
All versions
Vendor states this is fixed in 1 (unknown)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

VDB Entryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/security/cve/CVE-2026-87743
Issue Trackingx_refsource_REDHAT
Source: cverecord
https://bugzilla.redhat.com/show_bug.cgi?id=2530523
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:69470
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:69440

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-551

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