CVE
Dell Terraform Provider for PowerFlex, versions 1.5.0 through 1.8.0, contains an Improper Certificate Validation vulnerability in the SSH…
Affects Dell Terraform Provider for PowerFlex versions 1.5.0 through 1.8.0, whose SSH client skips host key checks by default. Fixed in version 1.9.0.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 1.9.0
- Who is exposed
- Default setups
Do first: Check every install: default setups are affected.
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 31/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Default setups
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Dell's Terraform Provider for PowerFlex contains an improper certificate validation flaw in its SSH client, where the default setting skips host key checks. A remote attacker without logging in could exploit this to expose information and gain unauthorized access.
Read the original description
Dell Terraform Provider for PowerFlex, versions 1.5.0 through 1.8.0, contains an Improper Certificate Validation vulnerability in the SSH client component.Terraform PowerFlex provider uses ssh.InsecureIgnoreHostKey() as the default SSH host key callback. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to information exposure and unauthorized access.
Who should check
Teams running the Dell Terraform Provider for PowerFlex, versions 1.5.0 through 1.8.0, to manage PowerFlex infrastructure
Read the source excerpt
“Dell Terraform Provider for PowerFlex, versions 1.5.0 through 1.8.0”
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure22/25Default setups, reachable over the network without a login
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.9/10CVSS 8.9
- No patch0/5No signal
What would change the score
- Would score about 71 if added to CISA KEV
- Would score about 66 if CISA's SSVC rates exploitation active
What to do
Check every install: default setups are affected.
Upgrade to a fixed version: 1.9.0.
Workaround: Explicitly provide the host_key parameter in your Terraform resources.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-91880 (Dell Terraform Provider for PowerFlex, versions 1.5.0 through 1.8.0, contains an Improper Certificate Validation vulnerability in the SSH…), using the cve.now data below.
Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.
What cve.now has for CVE-2026-91880 (entry last updated 2026-11-11):
Affected:
- Dell Terraform Provider for PowerFlex: version range not reported
Fixed versions: 1.9.0.
Conditions (all must be true for the bug to be hit):
- Dell Terraform Provider for PowerFlex, versions 1.5.0 through 1.8.0 (source: https://www.dell.com/support/kbdoc/en-in/000515434/dsa-2026-433-security-update-for-dell-terraform-provider-for-dell-storage-multiple-vulnerabilities)
- Default SSH host key callback is ssh.InsecureIgnoreHostKey(), so host keys are not checked by default (source: https://www.dell.com/support/kbdoc/en-in/000515434/dsa-2026-433-security-update-for-dell-terraform-provider-for-dell-storage-multiple-vulnerabilities)
Setup: the bug is reachable in a default setup; no special feature or setting is needed.
Attacker needs: network access, no login, no user action.
Workaround: Explicitly provide the host_key parameter in your Terraform resources. (source: https://www.dell.com/support/kbdoc/en-in/000515434/dsa-2026-433-security-update-for-dell-terraform-provider-for-dell-storage-multiple-vulnerabilities)
CISA KEV: CVE-2026-91880 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-91880 only. If you also check another CVE, look up its own KEV status; never assume it from this one.
How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.
Verify against the linked advisories before concluding, and cite the date you read each one:
- https://www.dell.com/support/kbdoc/en-in/000515434/dsa-2026-433-security-update-for-dell-terraform-provider-for-dell-storage-multiple-vulnerabilities
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.
Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.
Entry: https://cve.now/CVE-2026-91880
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-91880"}.Timeline
- CVE published
- First seen by cve.now
Affected versions
- Dell Terraform Provider for PowerFlex
Version range not reported
Evidence 3
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Advisory
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-91880
Is CVE-2026-91880 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
The provider's SSH client does not verify the remote server's host key by default, so it cannot confirm it is connecting to the intended host. The advisory says this leads to information exposure and unauthorized access.Source: dell.com
Am I affected, and how do I check?
Versions 1.5.0 through 1.8.0 of Dell Terraform Provider for PowerFlex contain the flaw. Check the provider version pinned in the Terraform configuration or lock file, and whether the host_key parameter is set in the resources that use SSH.Source: dell.com
How do I fix CVE-2026-91880?
Upgrade the provider to version 1.9.0 or later. Until the upgrade is done, explicitly provide the host_key parameter in the Terraform resources.Source: dell.com