CVE-2026-52680
Path traversal in Apache Kyuubi REST upload allows arbitrary file writes.
Is CVE-2026-52680 being exploited?
Not confirmed. CVE-2026-52680 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 0.83% probability of exploitation in the next 30 days.
How severe is CVE-2026-52680?
CVE-2026-52680 is rated Critical with a CVSS score of 9.8. 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-2026-52680?
Yes. A fix has been recorded for CVE-2026-52680. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-52680 affect?
CVE-2026-52680 affects Apache Kyuubi 1.7.0 - 1.11.1, Kyuubi server REST batch upload endpoint, Big data clusters running Kyuubi. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-52680?
Upgrade to Kyuubi 1.12.0; block/limit REST upload access; audit temp dirs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can supply path-traversal filenames to REST batch uploads, causing Kyuubi to write attacker-controlled files outside upload dir, possibly enabling code execution or config/data tampering (depends on FS perms).
Immediate action required
- affected>= 1.7.0 and <= 1.11.1
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.