Description
The BLOCKED access control list items that are evaluated to deny access on the the proxy protocol port can be bypassed completely when connecting over TCP or TLS and sending the query twice on connection that is kept open.
Published: 2026-08-26
Score: 8.2 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

This issue is fixed in 4.15.1 and all later versions.

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History

Wed, 26 Aug 2026 09:15:00 +0000

Type Values Removed Values Added
Description The BLOCKED access control list items that are evaluated to deny access on the the proxy protocol port can be bypassed completely when connecting over TCP or TLS and sending the query twice on connection that is kept open.
Title Bypass of BLOCKED ACL items on proxy protocol port over TCP or TLS
Weaknesses CWE-290
CWE-672
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: NLnet Labs

Published:

Updated: 2026-08-26T08:47:08.992Z

Reserved: 2026-08-11T10:27:22.294Z

Link: CVE-2026-19538

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T10:30:04Z

Weaknesses
  • CWE-290

    Authentication Bypass by Spoofing

  • CWE-672

    Operation on a Resource after Expiration or Release