NTAP-20261009-0004 — CVE-2026-72639 Elasticsearch Vulnerability in NetApp Products

Product family: Brocade SAN firmware  |  other NetApp product  |  highest CVSS: 6.5

CVEs in this advisory

• CVE-2026-72639 — MEDIUM · CVSS 6.5 · site index

What the CVE records say

CVE-2026-72639 — Elasticsearch does not enforce an upper bound on a user-supplied count accepted by a search highlighting option, and the allocation derived from that count is not accounted against any circuit breaker. An authenticated user holding only read privileges on a single searchable index can submit one small search request that causes the node to reserve an excessively large internal data structure. The allocation occurs before the existing highlighting safety limits are evaluated, so memory exhaustion raises a fatal error that terminates the Elasticsearch node process. This results in a denial of service for the affected node and degrades cluster routing and health. The defect is not volumetric and does not depend on the size of the indexed data, so a single request is sufficient.

Impact

Successful exploitation of this vulnerability could lead to Denial of Service (DoS).

Affected products

• Brocade SAN Navigator (SANnav)

References

• https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-120/389503 ↗

What to do

1. Compare your installed product and version against the affected list above and the official advisory's affected-versions table.
2. Apply the fixed release named in the official advisory, or the documented workaround if no fix ships yet.
3. Limit management-plane exposure (BMC/management interfaces, web UIs, SNMP) until patched.
4. Track follow-ups in the site CVE index and the security RSS feed.

Related reading

• Site CVE index — every CVE we track, split by year
• Security hub — recent NetApp advisories and what changed
• Security hardening baseline — applies to NetApp management planes generally
• Every NetApp advisory published in 2026

Browse all ONTAP CVEs → · Security hub