Affects Polaris GCS credential scope; could enable bucket-wide access across tenants.
CVE-2026-42811
Polaris GCS credentials bypass scope, enabling bucket-wide access.
Is CVE-2026-42811 being exploited?
Not confirmed. CVE-2026-42811 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 0.43% probability of exploitation in the next 30 days.
How severe is CVE-2026-42811?
CVE-2026-42811 is rated Critical with a CVSS score of 9.4. 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-2026-42811?
Yes. A fix has been recorded for CVE-2026-42811. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-42811 affect?
CVE-2026-42811 affects Apache Polaris, Google Cloud Storage. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-42811?
Patch Polaris when available; monitor bucket activity; rotate credentials.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Escalation to bucket-wide access: crafted identifiers bypass path restrictions to read, list, create or delete objects beyond the target table.
Patch when possible
- affected< 1.4.1
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.