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NTAP-20260918-0008 — CVE-2026-39956 jq Vulnerability in NetApp Products

Published 2026-09-18 · Updated 2026-09-18 · Status: Interim · Exploitation: Public · Severity: MEDIUM 6.1 · ONTAP affected: Yes

Official advisory: NTAP-20260918-0008 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: 6.1

CVEs in this advisory

CVE-2026-39956 — MEDIUM · CVSS 6.1 · site index

What the CVE records say

CVE-2026-39956 — jq is a command-line JSON processor. Prior to version 1.8.2, the _strindices builtin in jq's src/builtin.c passes its arguments directly to jv_string_indexes() without verifying they are strings, and jv_string_indexes() in src/jv.c relies solely on assert() checks that are stripped in release builds compiled with -DNDEBUG. This allows an attacker to crash jq trivially with input like _strindices(0), and by crafting a numeric value whose IEEE-754 bit pattern maps to a chosen pointer, achieve a controlled pointer dereference and limited memory read/probe primitive. Any deployment that evaluates untrusted jq filters against a release build is vulnerable. This issue has been patched in commit fdf8ef0f0810e3d365cdd5160de43db46f57ed03, which is part of version 1.8.2.

Impact

Successful exploitation of this vulnerability could lead to disclosure of sensitive information, or 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-2026-39956 ↗

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.