Guardrails-detectors: guardrails-detectors: unauthenticated regular-expression denial of service (redos) via detector_params.regex (guardrails-detectors)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.48 % · percentile 41 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Modified
Description
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.
Weaknesses (CWE)
- CWE-1333 — Inefficient Regular Expression Complexity
References
- https://access.redhat.com/errata/RHSA-2026:53261
- https://access.redhat.com/errata/RHSA-2026:53262
- https://access.redhat.com/errata/RHSA-2026:53263
- https://access.redhat.com/errata/RHSA-2026:60520
- https://access.redhat.com/errata/RHSA-2026:65126
- https://access.redhat.com/errata/RHSA-2026:73987
- https://access.redhat.com/security/cve/CVE-2026-15154
- https://bugzilla.redhat.com/show_bug.cgi?id=2498188
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat |
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · secalert@redhat.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-42382
- GCVE · GCVE-0-2026-15154
Affected configurations (NVD CPE)
cpe:2.3:a:redhat:openshift_ai:-:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| guardrails-detectors | affected 0 < d857e059f8a2dedb5c7ea9a2c307c4cfd7983fd1 |
| Red Hat · Red Hat OpenShift AI 2.25 | unaffected 1784230964 < * |
| Red Hat · Red Hat OpenShift AI 2.25 | unaffected 1787235925 < * |
| Red Hat · Red Hat OpenShift AI 3.3 | unaffected 1785137880 < * |
| Red Hat · Red Hat OpenShift AI 3.3 | unaffected 1789573032 < * |
| Red Hat · Red Hat OpenShift AI 3.4 | unaffected 1783569145 < * |
| Red Hat · Red Hat OpenShift AI 3.4 | unaffected 1786617316 < * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |