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PatchSiren cyber security CVE debrief

CVE-2026-18255 Red Hat CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-29T17:16:51.393Z and has not been modified since then. The CVE-2026-18255 vulnerability in Quay allows users configured in GLOBAL_READONLY_SUPER_USERS to view robot account tokens for repositories they are not members of. This could enable an attacker with read-only superuser privileges to impersonate any robot account. Affected systems should review configurations and user privileges to mitigate potential impersonation attacks. Organizations using Quay should verify their configurations and user privileges to mitigate potential impersonation attacks. The flaw was found in Quay, and evidence is based on NVD and Red Hat sources.

Vendor
Red Hat
Product
Red Hat Quay 3.15
CVSS
HIGH 7.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-29
Original CVE updated
2026-09-03
Advisory published
2026-07-29
Advisory updated
2026-09-03

Who should care

Organizations using Quay, especially those with users configured as GLOBAL_READONLY_SUPER_USERS, should be aware of this vulnerability and take necessary precautions.

Technical summary

The CVE-2026-18255 vulnerability in Quay allows users configured in GLOBAL_READONLY_SUPER_USERS to view robot account tokens for repositories they are not members of. This could enable an attacker with read-only superuser privileges to impersonate any robot account. Affected systems should review configurations and user privileges to mitigate potential impersonation attacks.

Defensive priority

Organizations using Quay should verify their configurations and user privileges to mitigate potential impersonation attacks.

Recommended defensive actions

  • Verify Quay configurations to restrict GLOBAL_READONLY_SUPER_USERS privileges.
  • Monitor user activities for suspicious behavior related to robot account tokens.
  • Implement additional access controls to limit repository visibility.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE-2026-18255 record indicates a flaw in Quay allowing users with GLOBAL_READONLY_SUPER_USERS privileges to view robot account tokens for repositories they are not members of. Evidence is based on NVD and Red Hat sources. Defenders should verify Quay configurations, user privileges, and monitor activities for suspicious behavior related to robot account tokens. Additional review of access controls and repository visibility is necessary.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-18255 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-18255

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-18255 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-18255

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.