Auth bypass in Rancher Github provider could grant access to any logged-in user; affects widely deployed Rancher instances.
CVE-2026-41053
Auth bypass in Rancher Github provider lets any logged-in user gain principal access.
Is CVE-2026-41053 being exploited?
Not confirmed. CVE-2026-41053 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.52% probability of exploitation in the next 30 days.
How severe is CVE-2026-41053?
CVE-2026-41053 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-41053?
Yes. A fix has been recorded for CVE-2026-41053. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-41053 affect?
CVE-2026-41053 affects Rancher (Github authentication provider) 2.13.x < 2.13.6, Rancher 2.14.x < 2.14.2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-41053?
Upgrade to 2.13.6/2.14.2+; audit access; rotate credentials.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Bypass authentication to gain principal access and access restricted resources via Github provider integration.
Immediate action required
- affected>= 2.14.0 and < 2.14.2
- affected>= 2.13.0 and < 2.13.6
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.