CVE-2026-9182
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedEsri ArcGIS Server contains an unrestricted file upload vulnerability. An unauthenticated attacker could exploit this issue by uploading a crafted file to the affected endpoint. Successful exploitation could allow arbitrary file upload, potentially allowing for other attacks. This issue impacts all versions of ArcGIS Server on Windows and Linux 12.0 and prior. This issue does not impact ArcGIS Enterprise for Kubernetes.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceEsri ArcGIS Server contains an unrestricted file upload vulnerability allowing unauthenticated attackers to upload arbitrary files to the server through an affected endpoint. The vulnerability affects all versions of ArcGIS Server on Windows and Linux 12.0 and prior, with successful exploitation potentially enabling further attacks such as remote code execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 12.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm Esri ArcGIS Server installationIdentify if Esri ArcGIS Server software is installed on the target system by checking for ArcGIS Server directories, services, or installed programsAffected if Esri ArcGIS Server is present on the system
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Determine installed ArcGIS Server versionLocate and read the ArcGIS Server version information - typically accessible through the ArcGIS Server Manager, REST admin interface, or installation metadataAffected if The installed version is 12.0 or any version lower than 12.0
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Verify upload endpoint accessibilityIdentify whether the file upload functionality is exposed and accessible on the ArcGIS Server - check for REST service endpoints or web interfaces that handle file uploadsAffected if The upload endpoint is exposed and reachable without additional network segmentation
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Check authentication configuration on upload endpointsReview the authentication settings on the identified upload endpoint to determine if unauthenticated access is permittedAffected if Authentication is not enforced or is bypassed on the upload endpoint
You are affected if Esri ArcGIS Server is installed with version 12.0 or lower AND the upload endpoint is accessible without authentication.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement strict file type validation on upload endpoints, store uploaded files outside the web root with no execution permissions, and apply vendor-provided patches when available.
- Consultation6.0 h
- Implementation20.0 h
- Testing10.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,808.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-9182 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-9182 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data