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CVE-2026-45558 roxy-wi CVE debrief

CVE-2026-45558 is a critical vulnerability in Roxy-WI, a web interface for managing Haproxy, Nginx, Apache, and Keepalived servers. An authenticated user with role ≤ 3 (user) can inject arbitrary HAProxy directives into the configuration, leading to remote code execution on the load balancer as the haproxy user.

Vendor
roxy-wi
Product
Unknown
CVSS
CRITICAL 9.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-10
Advisory published
2026-06-10
Advisory updated
2026-06-10

Who should care

Administrators and users of Roxy-WI, particularly those with role ≤ 3 (user), should be aware of this vulnerability and take immediate action to mitigate it.

Technical summary

The HAProxy section-save endpoints in Roxy-WI versions 8.2.6.4 and prior accept a JSON option field that is not validated or escaped. This allows an authenticated user to inject arbitrary HAProxy directives into the configuration, which is then pushed to the load balancer and executed.

Defensive priority

High

Recommended defensive actions

  • Upgrade to a patched version of Roxy-WI, if available.
  • Restrict access to the HAProxy section-save endpoints to authorized users only.
  • Monitor HAProxy configurations for suspicious changes.

Evidence notes

CVE-2026-45558 has a CVSS score of 9.9 and is considered CRITICAL. The vulnerability was published on 2026-06-10T15:16:36.600Z and last modified on 2026-06-10T19:37:41.437Z.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45558 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45558

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45558 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45558

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.