Bug 2508454 (CVE-2026-18255)

Summary:	CVE-2026-18255 quay: quay: Global read-only superuser can view robot account tokens
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	aruklets, doconnor
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	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.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-07-29 15:52:35 UTC

Reproduction steps:

1. Configure a user in GLOBAL_READONLY_SUPER_USERS only.
2. Confirm the same user is not present in SUPER_USERS.
3. Apply config and allow Quay/operator reconciliation.
4. Log in as that user.
5. Navigate to robot account management and token views for a repo they are not a member of.
6. Observe that token visibility is allowed.

Impact:
Read-only administrative users can perform actions beyond intended scope. Robot account tokens are persistent by default (they do not expire), and depending on configuration can grant read (pull), write (push), or admin level access to container image repositories.