Medium severity · published Aug 10, 2026
CVE-2026-19278
Stackrox: stackrox: privilege escalation via unanchored regular expressions in auth m2m role mappings
6.8
CVSS
0.3%
EPSS
No
On KEV
Description
A flaw was found in StackRox/RHACS Central's Auth Machine-to-Machine (M2M) token exchange. When an administrator configures M2M role mappings, the system uses unanchored regular expressions for matching claim values. This allows an attacker with a valid OpenID Connect (OIDC) token, whose claim value is a superstring of a configured pattern, to gain unauthorized access to roles they were not intended to receive. This can lead to privilege escalation within the system.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Advanced Cluster Security 4 · Red Hat
All versions, or not specified · source: vendor
Affected product
RH
Red Hat Advanced Cluster Security 4
Red Hat
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-19278
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-19278
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-19278
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2512524
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