CVE-2026-18255Network attack vector

Robot impersonation via unauthorized token disclosure

Published Jul 29, 2026 · Updated Jul 29, 2026

Improper access control in Red Hat Quay allows remote authenticated users with global read-only superuser access to obtain robot tokens. The robot-account API returns password-equivalent token values for repositories where the requesting account has no membership instead of limiting disclosure to authorized repository principals. The non-default GLOBAL_READONLY_SUPER_USERS configuration is required, and a disclosed token permits impersonation with the affected robot's assigned repository permissions.

CVSS severityUnavailable
Unscored
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Red Hat Quay allows remote authenticated users with global read-only superuser access to obtain robot tokens. The robot-account API returns password-equivalent token values for repositories where the requesting account has no membership instead of limiting disclosure to authorized repository principals. The non-default GLOBAL_READONLY_SUPER_USERS configuration is required, and a disclosed token permits impersonation with the affected robot's assigned repository permissions.

The record

CVE
CVE-2026-18255
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
389 Directory Server
Product
Red Hat Quay
Classifications
T1528
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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 vectornetwork
Required privilegesauthenticated

What is affected?

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

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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