# CVE-2023-4853

## Summary

- **CVE ID:** CVE-2023-4853
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-148
- **Published:** Sep 20, 2023
- **Last Modified:** Aug 4, 2026

## Description

A flaw was found in Quarkus where HTTP security policies are not sanitizing certain character permutations correctly when accepting requests, resulting in incorrect evaluation of permissions. This issue could allow an attacker to bypass the security policy altogether, resulting in unauthorized endpoint access and possibly a denial of service.

## Affected Products

- Red Hat — Openshift Serverless 1 on RHEL 8 (0:1.9.2-3.el8)
- Red Hat — Red Hat build of Quarkus 2.13.8.SP2 (2.13.8.Final-redhat-00005)
- Red Hat — Red Hat OpenShift Serverless 1.30 (1.9.2-3)
- Red Hat — Red Hat OpenShift Serverless 1.30 (1.30.1-1)
- Red Hat — Red Hat OpenShift Serverless 1.30 (1.30.0-5)
- Red Hat — Red Hat OpenShift Serverless 1.30 (1.30.0-6)
- Red Hat — RHEL-8 based Middleware Containers (7.13.4-3)
- Red Hat — RHEL-8 based Middleware Containers (7.13.4-2)

## References

- [CNA](https://access.redhat.com/errata/RHSA-2023:5170)
- [CNA](https://access.redhat.com/errata/RHSA-2023:5310)
- [CNA](https://access.redhat.com/errata/RHSA-2023:5337)
- [CNA](https://access.redhat.com/errata/RHSA-2023:5446)
- [CNA](https://access.redhat.com/errata/RHSA-2023:5479)
- [CNA](https://access.redhat.com/errata/RHSA-2023:5480)
- [CNA](https://access.redhat.com/errata/RHSA-2023:6107)
- [CNA](https://access.redhat.com/errata/RHSA-2023:6112)
- [CNA](https://access.redhat.com/errata/RHSA-2023:7653)
- [CNA](https://access.redhat.com/security/cve/CVE-2023-4853)
- [CNA](https://access.redhat.com/security/vulnerabilities/RHSB-2023-002)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2238034)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 56.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._