Threat intelligence

Backstage <= 1.4.2 - Unauthenticated Privilege Escalation via Permissive Demo Role Capabilities

CVE-2026-9842 · backstage

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Backstage at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Backstage <= 1.4.2 - Unauthenticated Privilege Escalation via Permissive Demo Role Capabilities
Affected software: backstage(Plugin)
Affected versions: ≤ 1.4.2
Authentication: Unauthenticated
Vulnerability type: Privilege escalation
CVE: CVE-2026-9842
Published: 7 July 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow a lower-privilege user to perform actions reserved for administrators.
Source: Data imported from Wordfence Intelligence (advisory 5bcf1f02-0946-4e96-a81b-00c7c48d64b3). Methodology and redistribution notes

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