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NTAP-20260918-0009 — CVE-2026-41256 jq Vulnerability in NetApp Products

Published 2026-09-18 · Updated 2026-09-18 · Status: Interim · Exploitation: Public · Severity: MEDIUM 5.5 · ONTAP affected: Yes

Official advisory: NTAP-20260918-0009 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: 5.5

CVEs in this advisory

CVE-2026-41256 — MEDIUM · CVSS 5.5 · site index

What the CVE records say

CVE-2026-41256 — jq is a command-line JSON processor. In 1.8.1 and earlier, Top-level jq programs loaded from a file with -f are truncated at the first embedded NUL byte on current upstream HEAD. A crafted filter file such as . followed by \x00 and arbitrary suffix compiles and executes as only the prefix before the NUL. This leaves jq with a post-CVE-2026-33948 prefix/full-buffer mismatch on the compilation path even though the JSON parser path has already been fixed.

Impact

Successful exploitation of this vulnerability could lead to addition or modification of data.

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-2026-41256 ↗

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.