CVE-2023-4853Public exploitNetwork attack vector

Unauthenticated endpoint access via unnormalized repeated slashes

Published Sep 20, 2023 · Updated Aug 4, 2026

Improper authorization in Quarkus HTTP security policies allows remote attackers to access protected endpoints via repeated path slashes. The path matcher treats adjacent forward slashes as separate empty segments instead of normalizing the request before evaluating the configured policy. Exposure requires path-based HTTP security rules; successful requests can disclose protected data, invoke restricted functions, or interrupt service.

CVSS severity8.1
High
EPSS probability1.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Quarkus HTTP security policies allows remote attackers to access protected endpoints via repeated path slashes. The path matcher treats adjacent forward slashes as separate empty segments instead of normalizing the request before evaluating the configured policy. Exposure requires path-based HTTP security rules; successful requests can disclose protected data, invoke restricted functions, or interrupt service.

The record

CVE
CVE-2023-4853
Published
Sep 20, 2023
Updated
Aug 4, 2026
Vendor
Red Hat
Product
Red Hat Process Automation 7
Classifications
CWE-148, CWE-863, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · Red Hat Process Automation 7Affected versions are unavailable in this record.
Red Hat · RHEL-8 based Middleware ContainersAffected versions are unavailable in this record.
Red Hat · Red Hat build of QuarkusAffected versions are unavailable in this record.
Red Hat · Red Hat OpenShift ServerlessAffected versions are unavailable in this record.

Published CVSS scores

8.1NISTCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-148Improper Neutralization of Input Leaders
CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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