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HIGH

CVE-2026-18255

CVSS v3

7.2

HIGH

EPSS Score

0.8 %

exploit probability, as of 2026-10-17

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2026-18255 Red Hat Product Security29 products fixed

    quay: quay: Global read-only superuser can view robot account tokens

  • RHSA-2026:81110 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Quay

  • RHSA-2026:74511 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Quay 3.17.5

  • RHSA-2026:70267 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Quay 3.14.9

  • RHSA-2026:69255 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Quay 3.16.6

  • RHSA-2026:66523 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Quay 3.12.22

3 more advisories

Full record on NVD

Description

A flaw was found in Quay. A user configured in GLOBAL_READONLY_SUPER_USERS is able to view robot account tokens for repositories they are not a member of, allowing an attacker with read-only superuser privileges to impersonate any robot account.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
2026-07-29
Last Modified
2026-07-30

Frequently asked questions

What is CVE-2026-18255?

A flaw was found in Quay. A user configured in GLOBAL_READONLY_SUPER_USERS is able to view robot account tokens for repositories they are not a member of, allowing an attacker with read-only superuser privileges to impersonate any robot account.

Is CVE-2026-18255 actively exploited?

Active exploitation of CVE-2026-18255 has not been confirmed. Its EPSS score was 0.8% on 2026-10-17, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-18255?

CVE-2026-18255 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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