# CVE-2026-2813: Unvalidated Redirect in ArcGIS Server

> An authenticated attacker can redirect users to untrusted sites via ArcGIS Server login, potentially exposing limited confidential data.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 20 May 2026
- **Updated:** 20 May 2026
- **Also known as:** GHSA-48m7-r7vc-4m4f

## What is CVE-2026-2813?

CVE-2026-2813 is a medium-severity vulnerability in Esri Arcgis Server, published on 20 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

ArcGIS Server contains an input validation weakness in the login redirection workflow. An Authenticated attacker could exploit this issue by sending a specially crafted request, Successful exploitation may result in the application redirecting the browser to an unintended, untrusted site, resulting in a limited confidentiality impact under specific user interaction conditions.
The vulnerability affects only the client side navigation logic during authentication and remains confined to the same security boundary. No server side compromise or cross component impact is possible.  This issue affects ArcGIS Server 11.5.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2026-2813?

It affects 1 product.


Products: Esri Arcgis Server.

## How do I fix CVE-2026-2813?

No fix has been published for CVE-2026-2813 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2813 being exploited?

There is no known exploitation of CVE-2026-2813 in the wild and no public exploit code.

## Other vulnerabilities in Esri Arcgis Server

- [CVE-2025-57870](https://insights.sbomify.com/CVE-2025-57870/): BUG-000179884 - There is a security vulnerability in ArcGIS Server Feature Services. (critical 10.0)
- [CVE-2026-9181](https://insights.sbomify.com/CVE-2026-9181/): Directory Traversal in ArcGIS Server (critical 9.8)
- [CVE-2026-9182](https://insights.sbomify.com/CVE-2026-9182/): Unvalidated File Upload vulnerability in ArcGIS Server. (critical 9.8)
- [CVE-2020-35712](https://insights.sbomify.com/CVE-2020-35712/): Server-side request forgery in n/a (critical 9.8)
- [CVE-2021-29102](https://insights.sbomify.com/CVE-2021-29102/): There is a Server-Side Request Forgery (SSRF) vulnerability in Esri ArcGIS Server Manager version 10.8.1 and below. (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2813 and fix it if it is affected.

What it is: CVE-2026-2813 is a medium-severity vulnerability in Esri Arcgis Server, published on 20 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-2813 in the wild and no public exploit code.

Affected product: Esri Arcgis Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-2813/ (Markdown: https://insights.sbomify.com/CVE-2026-2813/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2813
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2813
- OSV: https://osv.dev/vulnerability/CVE-2026-2813

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2813/
Summaries are generated and may contain mistakes; the official description above is the record.