CVE-2026-1784: External Control of System or Configuration Setting in Red Hat Red Hat OpenShift Container Platform 4.13
The Route OpenShift resource allows to define routes to make pods reachable at a subdomain through HAProxy. It was found that the checks performed on the spec.path YAML stanza in a Route document was insufficient and could allow a controlled injection of the HAProxy configuration.
AI Analysis
Technical Summary
The vulnerability CVE-2026-1784 affects the Route resource in Red Hat OpenShift Container Platform 4.19 and 4.21 releases. The Route resource allows defining routes to expose pods via HAProxy. Insufficient validation of the spec.path YAML stanza in a Route document permits controlled injection of HAProxy configuration, leading to external control of system or configuration settings (CWE-15). This vulnerability has a CVSS 3.1 base score of 8.8 (high severity) with impact on confidentiality, integrity, and availability. Red Hat has issued security advisories RHSA-2026:23241 and RHSA-2026:23246 providing fixed container images and packages in OpenShift Container Platform 4.21.19 and 4.19.33 respectively. Users should upgrade to these versions following official upgrade instructions to remediate the vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows an attacker with limited privileges to inject configuration into HAProxy via the Route resource, potentially leading to full compromise of system confidentiality, integrity, and availability. This can affect the routing and access control of pods within the OpenShift cluster, posing significant risk to cluster security and operations.
Mitigation Recommendations
Red Hat has released fixed versions OpenShift Container Platform 4.19.33 and 4.21.19 that address this vulnerability. Users should upgrade affected clusters to these versions as soon as possible using the official upgrade procedures documented by Red Hat. No alternative mitigations or workarounds are specified in the vendor advisory. Patch status is confirmed as fixed in these releases.
CVE-2026-1784: External Control of System or Configuration Setting in Red Hat Red Hat OpenShift Container Platform 4.13
Description
The Route OpenShift resource allows to define routes to make pods reachable at a subdomain through HAProxy. It was found that the checks performed on the spec.path YAML stanza in a Route document was insufficient and could allow a controlled injection of the HAProxy configuration.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-1784 affects the Route resource in Red Hat OpenShift Container Platform 4.19 and 4.21 releases. The Route resource allows defining routes to expose pods via HAProxy. Insufficient validation of the spec.path YAML stanza in a Route document permits controlled injection of HAProxy configuration, leading to external control of system or configuration settings (CWE-15). This vulnerability has a CVSS 3.1 base score of 8.8 (high severity) with impact on confidentiality, integrity, and availability. Red Hat has issued security advisories RHSA-2026:23241 and RHSA-2026:23246 providing fixed container images and packages in OpenShift Container Platform 4.21.19 and 4.19.33 respectively. Users should upgrade to these versions following official upgrade instructions to remediate the vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows an attacker with limited privileges to inject configuration into HAProxy via the Route resource, potentially leading to full compromise of system confidentiality, integrity, and availability. This can affect the routing and access control of pods within the OpenShift cluster, posing significant risk to cluster security and operations.
Mitigation Recommendations
Red Hat has released fixed versions OpenShift Container Platform 4.19.33 and 4.21.19 that address this vulnerability. Users should upgrade affected clusters to these versions as soon as possible using the official upgrade procedures documented by Red Hat. No alternative mitigations or workarounds are specified in the vendor advisory. Patch status is confirmed as fixed in these releases.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-02-02T21:17:24.893Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-1784","vendor":"Red Hat"}]
Threat ID: 6a1e9560e29bf47b50adbe51
Added to database: 06/02/2026, 08:33:36 UTC
Last enriched: 07/30/2026, 01:36:26 UTC
Last updated: 07/31/2026, 21:26:40 UTC
Views: 68
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