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Advisory severityMedium6.5Red Hat Linux

Medium [CVE-2026-15154] Unauthenticated Regular-Expression Denial of Service (ReDoS) via detector_params.regex

This medium-severity Red Hat Linux advisory covers CVE-2026-15154 affecting Red Hat OpenShift AI 2.25, Red Hat OpenShift AI 3.3, Red Hat OpenShift AI 3.4.

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

CVE-2026-15154 Source published Source updated

VulniPulse record published Record updated

CVE-2026-15154
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

A flaw was found in `guardrails-detectors`, a component of Red Hat OpenShift AI. This vulnerability, known as Regular Expression Denial of Service (ReDoS), allows a remote attacker to provide specially crafted regular expressions to the public detection API.

This can cause catastrophic backtracking, leading to a worker process consuming 100% CPU indefinitely and resulting in a denial of service for the entire guardrails-mediated LLM pipeline. Exploitation requires network adjacency, as end-users do not directly interact with the vulnerable API.

Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-1333.

Affected Red Hat products: Red Hat OpenShift AI 2.25; Red Hat OpenShift AI 3.3; Red Hat OpenShift AI 3.4. Red Hat fixing advisory: RHSA-2026:53261, RHSA-2026:65126, RHSA-2026:53263, RHSA-2026:73987, RHSA-2026:53262, RHSA-2026:60520.

Is CVE-2026-15154 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-15154 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-2026-15154?

Upgrade to a fixed release named by Red Hat:

  • rhoai/odh-built-in-detector-rhel9:1784230964
  • rhoai/odh-built-in-detector-rhel9:1787235925
  • rhoai/odh-built-in-detector-rhel9:1785137880
  • rhoai/odh-built-in-detector-rhel9:1789573032
  • rhoai/odh-built-in-detector-rhel9:1783569145
  • rhoai/odh-built-in-detector-rhel9:1786617316
  • RHSA-2026:53261
  • RHSA-2026:65126
  • RHSA-2026:53263
  • RHSA-2026:73987
  • RHSA-2026:53262
  • RHSA-2026:60520

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 13 days ago·verify at source

Fixed versions
  • rhoai/odh-built-in-detector-rhel9:1784230964
  • rhoai/odh-built-in-detector-rhel9:1787235925
  • rhoai/odh-built-in-detector-rhel9:1785137880
  • rhoai/odh-built-in-detector-rhel9:1789573032
  • rhoai/odh-built-in-detector-rhel9:1783569145
  • rhoai/odh-built-in-detector-rhel9:1786617316
  • RHSA-2026:53261
  • RHSA-2026:65126
  • RHSA-2026:53263
  • RHSA-2026:73987
  • RHSA-2026:53262
  • RHSA-2026:60520

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Mitigation

Upgrade to a fixed release: rhoai/odh-built-in-detector-rhel9:1784230964, rhoai/odh-built-in-detector-rhel9:1787235925, rhoai/odh-built-in-detector-rhel9:1785137880, rhoai/odh-built-in-detector-rhel9:1789573032, rhoai/odh-built-in-detector-rhel9:1783569145, rhoai/odh-built-in-detector-rhel9:1786617316. 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 13 days ago·verify at source

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