CVE-2026-41486
RAY Data Parquet schema parsing leads to RCE via PyArrow deserialization.
Is CVE-2026-41486 being exploited?
Not confirmed. CVE-2026-41486 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 0.47% probability of exploitation in the next 30 days.
How severe is CVE-2026-41486?
CVE-2026-41486 is rated High with a CVSS score of 8.9. 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-2026-41486?
Yes. A fix has been recorded for CVE-2026-41486. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-41486 affect?
CVE-2026-41486 affects Ray Data (v2.54.0 to <2.55.0), PyArrow Parquet reader in affected Ray setup. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-41486?
Upgrade to Ray Data 2.55.0+ (and compatible PyArrow).
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE via crafted Parquet metadata triggers cloudpickle.loads; attacker can run arbitrary code on host.
Patch when possible
- affected>= 2.54.0 and < 2.55.0
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.