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CVE-2026-94571

Quick assessment

Affected
OpenStack Octavia
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 passe

CVSS 9.4 · Critical EPSS 0.33% · P27

Affected Version Matrix 3

VendorProduct Version RangeStatus
OpenStack Octavia 0.8.0< 16.1.0 affected
17.0.0< 17.0.1 affected
18.0.0< 18.0.1 affected
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I. Basic Information for CVE-2026-94571

Vulnerability Information

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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenStack Octavia 0.8.0 ~ 16.1.0 -

II. Public POCs for CVE-2026-94571

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III. Intelligence Information for CVE-2026-94571

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Mailing List Discussions for CVE-2026-94571 (1)

Other References for CVE-2026-94571 (5)

IV. Related Vulnerabilities

Same product: Octavia
Same vendor: OpenStack
Same weakness: CWE-94

V. Comments for CVE-2026-94571

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