CVE-2026-45558Public exploitNetwork attack vector

Authenticated code execution via HAProxy directive injection

Published Jun 10, 2026 · Updated Jun 10, 2026

Configuration injection in Roxy-WI 8.2.6.4 and earlier allows remote authenticated users to execute code on managed HAProxy servers. HAProxy section-save handlers accept newline-bearing option values, and three Jinja templates render them verbatim before uploading and reloading the generated configuration. Any user-role account in the target server's management group can add external-check directives that execute as the haproxy user on each health-check tick.

CVSS severity9.9
Critical
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Configuration injection in Roxy-WI 8.2.6.4 and earlier allows remote authenticated users to execute code on managed HAProxy servers. HAProxy section-save handlers accept newline-bearing option values, and three Jinja templates render them verbatim before uploading and reloading the generated configuration. Any user-role account in the target server's management group can add external-check directives that execute as the haproxy user on each health-check tick.

The record

CVE
CVE-2026-45558
Published
Jun 10, 2026
Updated
Jun 10, 2026
Vendor
Roxy-WI
Product
Roxy-WI
Classifications
CWE-78, CWE-94, CWE-20, CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 8.2.6.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Roxy-WI · Roxy-WIversion=<= 8.2.6.4

Published CVSS scores

9.9GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-20Improper Input Validation
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

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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