CVE-2026-87743
HIGHDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploit Intelligence
EPSS data unavailable for this CVE.
References
Related Vulnerabilities
Other CWE-551 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-34429 | Medium | 5.3 | 99% | - | Fix |
| CVE-2021-28164 | Medium | 5.3 | 82% | - | Fix |
| CVE-2021-28165 | High | 7.5 | 54% | - | Fix |
| CVE-2023-23924 | Critical | 10.0 | 3.6% | - | - |
| CVE-2021-32777 | High | 8.6 | 3.3% | - | Fix |
| CVE-2026-44575 | High | 7.5 | 1.6% | - | Fix |
Common questions
How do I fix CVE-2026-87743?
No published fix for CVE-2026-87743 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
How severe is CVE-2026-87743?
CVE-2026-87743 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-18.