CVE-2026-42812
Polaris metadata path abuse enables writes to attacker-controlled storage.
Is CVE-2026-42812 being exploited?
Not confirmed. CVE-2026-42812 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 0.36% probability of exploitation in the next 30 days.
How severe is CVE-2026-42812?
CVE-2026-42812 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-2026-42812?
Yes. A fix has been recorded for CVE-2026-42812. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-42812 affect?
CVE-2026-42812 affects Polaris catalog, Apache Iceberg, Cloud storage backends configured with write.metadata.path. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-42812?
Tighten write.metadata.path validation and location checks; monitor changes; patch when available.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Writes table metadata to attacker-chosen storage, enabling data exposure, modification, or credential vending.
Immediate action required
- 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.