CVE-2026-15154Public exploit

Pipeline denial of service via unchecked regex

Published Jul 8, 2026 · Updated Jul 8, 2026

Regular expression denial of service in Red Hat OpenShift AI allows remote attackers on an adjacent network to exhaust detector workers. RegexDetectorRegistry.handle_request passes unrecognized detector_params.regex values verbatim to Python re.finditer without a timeout, length limit, or complexity check. Requests normally pass through the Guardrails Orchestrator; four concurrent crafted patterns can pin all workers, interrupting the pipeline or bypassing guardrails.

CVSS severity6.5
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Regular expression denial of service in Red Hat OpenShift AI allows remote attackers on an adjacent network to exhaust detector workers. RegexDetectorRegistry.handle_request passes unrecognized detector_params.regex values verbatim to Python re.finditer without a timeout, length limit, or complexity check. Requests normally pass through the Guardrails Orchestrator; four concurrent crafted patterns can pin all workers, interrupting the pipeline or bypassing guardrails.

The record

CVE
CVE-2026-15154
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
389 Directory Server
Product
Red Hat OpenShift AI
Classifications
CWE-1333, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

389 Directory Server · Red Hat OpenShift AIAffected versions are unavailable in this record.

Published CVSS scores

6.5Red HatCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1333Inefficient Regular Expression Complexity
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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