Medium6.5Red 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.

CVE-2026-15154 Published Jul 8, 2026Updated by vendor Jul 8, 2026

CVE-2026-15154

Affected products & platforms

Red Hat LinuxUnclassified

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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-2026:53263, RHSA-2026:53262.

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 12 days ago·verify at source

Fixed versions

rhoai/odh-built-in-detector-rhel9:1784230964
rhoai/odh-built-in-detector-rhel9:1785137880
rhoai/odh-built-in-detector-rhel9:1783569145
RHSA-2026:53261
RHSA-2026:53263
RHSA-2026:53262

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Mitigation

Upgrade to a fixed release: rhoai/odh-built-in-detector-rhel9:1784230964, rhoai/odh-built-in-detector-rhel9:1785137880, rhoai/odh-built-in-detector-rhel9:1783569145, RHSA-2026:53261, RHSA-2026:53263, RHSA-2026:53262. That is the remediation for this advisory.

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

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Red Hat Security Data APIofficial
Official vendor source used to discover this advisory; it remains the authority for affected products and remediation. Discovered from the machine-readable feed https://access.redhat.com/hydra/rest/securitydata/cve.json; this link opens the Red Hat Linux advisory index instead of the raw feed document.
Red Hat Linux
Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Red Hat Linux
CVE.org CNA affected-product recordCVE.org
Structured CNA affected[] data independently confirmed the affected product scope; native advisory content remains authoritative.
CVE Program

Cross-references

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CVE-2026-15154NVD CVE.org MITRE

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