Low

CVE-2026-22056 — CVE-2026-22056 Denial of Service Vulnerability in StorageGRID (formerly StorageGRID Webscale)

StorageGRID (formerly StorageGRID Webscale) versions 11.5 and higher in a non-standard configuration and scenario are susceptible to a Denial of Service vulnerability. Successful exploit could allow an attacker with some control over the environment to cause a partial Denial of Service.

Published Aug 28, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: netapp

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

No scoring signals.

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Netapp

Storagegrid

CVSS base

2.3

Low · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Netapp Storagegrid).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Netapp	Storagegrid	version 11.5	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

High

Attack requirements

Present

Privileges required

Low

User interaction

None

Scope

Confidentiality (vulnerable system)

None

Integrity (vulnerable system)

None

Availability (vulnerable system)

Low

Confidentiality (subsequent)

None

Integrity (subsequent)

None

Availability (subsequent)

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
2.3	CVSS 4.0	Low	—	—	security-alert@netapp.com via NIST National Vulnerability Database
2.3	CVSS 4.0	Low	—	—	netapp via CVE Program (cve.org) e CISA ADP

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

(score shown at the top: security-alert@netapp.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-774

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · netapp/storagegrid
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 2.3
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Awaiting Analysis
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 28, 2026 · netapp

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

1 on the record

security.netapp.com/advisory/NTAP-20260828-0021/
vendor-advisory, NIST National Vulnerability Database

Elsewhere on this site

Netapp
every CVE for this vendor

CWE-774
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-22051 Exposure of Sensitive Information in Netapp Storagegrid Apr 20, 2026
Critical CVE-2025-25292 Ruby SAML vulnerable to SAML authentication bypass due to namespace handling (parser differential) Mar 12, 2025
Critical CVE-2022-37434 zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in inflate.c... Aug 5, 2022
High CVE-2022-0778 Infinite loop in BN_mod_sqrt() reachable when parsing certificates Mar 15, 2022
Critical CVE-2021-40438 Apache HTTP Server-Side Request Forgery (SSRF) KEV Sep 16, 2021
Medium CVE-2021-3449 NULL pointer deref in signature_algorithms processing Mar 25, 2021

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-22056 is "CVE-2026-22056 Denial of Service Vulnerability in StorageGRID (formerly StorageGRID Webscale)", rated Low. It affects Storagegrid (Netapp); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 2.3 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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