CVE-2026-94571

Publication date 21 September 2026

Last updated 24 September 2026

Ubuntu priority

Medium

Why this priority?

Description

In OpenStack Octavia before 18.0.1, the Amphora provider driver did not reject control characters in the L7 policy redirect_url and redirect_prefix fields. The RFC 3986 URL validator percent-encodes control characters before validating, and thus newlines passed structural checks, but Octavia stored and wrote the raw unencoded value directly into the HAProxy configuration generated on the amphora. An authenticated project member who owns a load balancer can therefore inject arbitrary HAProxy directives through a REDIRECT_TO_URL L7 policy. Only deployments using the Amphora provider are affected.

Status

Package Ubuntu Release Status
octavia 26.04 LTS resolute
Fixed 1:18.0.0-0ubuntu2.1
24.04 LTS noble
Fixed 1:14.0.0-0ubuntu1.6
22.04 LTS jammy
Fixed 1:10.1.1-0ubuntu1.5
20.04 LTS focal
Needs evaluation

Severity score breakdown

CVSS version: CVSS v4.0

Base score 9.4 · Critical

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References

Related Ubuntu Security Notices (USN)

    • USN-8814-1
    • Octavia vulnerabilities
    • 24 September 2026

Other references

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