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NTAP-20260918-0006 — CVE-2026-43894 jq Vulnerability in NetApp Products

Published 2026-09-18 · Updated 2026-09-18 · Status: Interim · Exploitation: Public · Severity: MEDIUM 6.2 · ONTAP affected: Yes

Official advisory: NTAP-20260918-0006 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: ONTAP · SolidFire / NetApp HCI | ONTAP-relevant | highest CVSS: 6.2

CVEs in this advisory

CVE-2026-43894 — MEDIUM · CVSS 6.2 · site index

What the CVE records say

CVE-2026-43894 — jq is a command-line JSON processor. In 1.8.1 and earlier, when decNumberFromString is given a number literal of INT_MAX-1 (2147483646) digits, the D2U() macro overflows during signed-int arithmetic. The wrapped negative value bypasses the heap-allocation size check, causes the function to use a 30-byte stack buffer, and then writes ≈715 million 16-bit units (≈1.4 GiB) at an offset 1.43 GiB below the stack frame. The written content is fully attacker-controlled (the parsed decimal digits, packed 3-per-unit).

Impact

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

Affected products

Cloud Volumes ONTAP Mediator
NetApp SolidFire & HCI Management Node
NetApp SolidFire & HCI Storage Node (Element Software)

References

https://nvd.nist.gov/vuln/detail/CVE-2026-43894 ↗

What to do

Check the affected products listed above against the official advisory's affected-versions table — that is where the exact ONTAP 9 release, ONTAP tool, or management product versions are named.
If affected and a fixed release exists, plan the upgrade — see the ONTAP upgrade runbook.
If exploitation is listed as "active", treat remediation as urgent and review exposure (management LIFs, ONTAP S3, SnapMirror endpoints).
Harden in parallel: security hardening baseline and ransomware protection on ONTAP.