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Advisory severityCritical9.3Vendor: HighRed Hat Linux

Critical [CVE-2026-15143] SSRF and local file read via user-supplied XML Schema (xml-with-schema:)

This critical-severity Red Hat Linux advisory covers CVE-2026-15143 affecting Red Hat OpenShift AI 2.25, Red Hat OpenShift AI 3.4.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-15143 Source published Source updated

VulniPulse record published Record updated

CVE-2026-15143
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

A flaw was found in the file_type content detector of guardrails-detectors. This vulnerability allows a remote attacker to supply an arbitrary XML Schema Definition (XSD) string, which is processed without proper restrictions.

This can lead to server-side requests to arbitrary URLs or local file reads, potentially resulting in sensitive information disclosure, such as cloud provider credentials or access to internal network services. This vulnerability is rated as Important.

It allows an attacker with network access to the detector service to perform Server-Side Request Forgery (SSRF) and local file reads. This is due to the guardrails-detectors component accepting arbitrary XML Schema Definition (XSD) strings, which are then processed by the xmlschema library without restricting external schemaLocation references.

Red Hat severity: Important — CVSS 9.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N). Weakness: CWE-918.

Affected Red Hat products: Red Hat OpenShift AI 2.25; Red Hat OpenShift AI 3.4. Red Hat fixing advisory: RHSA-2026:87410, RHSA-2026:84734.

Is CVE-2026-15143 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-15143 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-15143?

Upgrade to a fixed release named by Red Hat:

  • rhoai/odh-built-in-detector-rhel9:1791364320
  • rhoai/odh-guardrails-detector-huggingface-runtime-rhel9:1791367475
  • rhoai/odh-built-in-detector-rhel9:1791537794
  • rhoai/odh-guardrails-detector-huggingface-runtime-rhel9:1791535841
  • RHSA-2026:87410
  • RHSA-2026:84734

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

Fixed versions
  • rhoai/odh-built-in-detector-rhel9:1791364320
  • rhoai/odh-guardrails-detector-huggingface-runtime-rhel9:1791367475
  • rhoai/odh-built-in-detector-rhel9:1791537794
  • rhoai/odh-guardrails-detector-huggingface-runtime-rhel9:1791535841
  • RHSA-2026:87410
  • RHSA-2026:84734

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

Mitigation

Upgrade to a fixed release: rhoai/odh-built-in-detector-rhel9:1791364320, rhoai/odh-guardrails-detector-huggingface-runtime-rhel9:1791367475, rhoai/odh-built-in-detector-rhel9:1791537794, rhoai/odh-guardrails-detector-huggingface-runtime-rhel9:1791535841, RHSA-2026:87410, RHSA-2026:84734. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

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