CVE-2026-9182: Esri ArcGIS Server contains an unrestricted file upload vulnerability

Q: How do I fix CVE-2026-9182?

arcgis server: upgrade to newer than 12.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-9182 being exploited?

CVE-2026-9182 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-9182 affect?

CVE-2026-9182 affects arcgis server. Severity is critical (CVSS 9.8). Esri 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, pot

Q: How urgent is CVE-2026-9182?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-9182 is a critical-severity flaw (CVSS 9.8) affecting arcgis server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Esri 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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-434
Published	2026-07-06
Last modified	2026-10-25

Publisher (CNA): Environmental Systems Research Institute, Inc. · Vendor: esri

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-06 19:17 UTCPublished CVE record published
2026-10-25 20:10 UTCUpdated Record last modified

esri arcgis server UPGRADE

Affected: <= 12.0

Fixed in: newer than 12.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy arcgis-server || rpm -q arcgis-server || arcgis-server --version

2. UPGRADE to newer than 12.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade arcgis-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade arcgis-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · python-apprise · FIXED · 2.1.0-1.fc46 · FEDORA-2026-ef67a72c5d · source

sudo dnf upgrade --advisory=FEDORA-2026-ef67a72c5d

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-9182?

arcgis server: upgrade to newer than 12.0. Exact commands for each OS are on this page.

Is CVE-2026-9182 being exploited?

CVE-2026-9182 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-9182 affect?

CVE-2026-9182 affects arcgis server. Severity is critical (CVSS 9.8). Esri 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, pot

How urgent is CVE-2026-9182?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Kubernetes vulnerabilities · Windows vulnerabilities

Related CVEs

CVE-2026-9181 CRITICAL 9.8 UPGRADE Esri ArcGIS Server contains a directory traversal vulnerability

References

← Back to latest CVEs