EUVD-2026-42858
GHSA-85xg-h6rv-rgf5
Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Network-reachable XSD input with no auth or interaction (AV:N/AC:L/PR:N/UI:N); SSRF reaching other systems changes scope (S:C) with high confidentiality (C:H), minor integrity (I:L), no availability impact.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
A flaw was found in the guardrails-detectors component. This vulnerability allows a remote attacker to perform a blind Server-Side Request Forgery (SSRF) by submitting a specially crafted XML Schema Definition (XSD) string. This can lead to unauthorized access to sensitive information, including credentials from cloud metadata services, Kubernetes API, internal MinIO, and other internal network endpoints. Additionally, it enables local file reads of critical data such as service account tokens and pod secrets.
Articles & Coverage 1
AnalysisAI
Server-Side Request Forgery in the guardrails-detectors component allows a remote attacker to submit a crafted XML Schema Definition (XSD) that forces the service to make attacker-directed requests, reaching cloud metadata services, the Kubernetes API, internal MinIO object storage, and other internal endpoints, and to read local files such as service account tokens and pod secrets. Because the flaw is blind SSRF chained to local file disclosure inside a container/Kubernetes context, an attacker can harvest credentials and pivot deeper into the cluster. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the guardrails-detectors endpoint accept and parse an attacker-supplied XSD string, and that the underlying XML/XSD parser resolve external references (external schemas/entities and file:// URIs) rather than having them disabled - that XSD-processing path is the concrete precondition. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are largely aligned toward high priority: CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N describes network-reachable, low-complexity, unauthenticated exploitation with high confidentiality impact and a scope change, and the reported base score is 9.3. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who can reach the detector API submits a crafted XSD whose external schema/entity reference points at http://169.254.169.254/ or file:///var/run/secrets/kubernetes.io/serviceaccount/token; the parser dereferences it and, via the blind SSRF and file-read primitive, leaks cloud IAM credentials or the pod's service account token. With those tokens the attacker authenticates to the cloud metadata-backed role or the Kubernetes API and pivots into the cluster and internal MinIO storage. … |
| Remediation | No vendor-released patch version is identified in the available data; monitor the Red Hat advisory (https://access.redhat.com/security/cve/CVE-2026-15378) and Bugzilla 2498941 (https://bugzilla.redhat.com/show_bug.cgi?id=2498941) and upgrade to the fixed guardrails-detectors build as soon as it is published. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all deployments of guardrails-detectors component and assess whether they process untrusted XSD inputs; document affected services and their access levels. …
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External POC / Exploit Code
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