---
title: "CVE-2025-8696: DoS attack against the Stork UI from an unauthenticated user"
slug: "cve-2025-8696"
description: "If an unauthenticated user sends a large amount of data to the Stork UI, it may cause memory and disk use problems for the system running the Stork server."
updated: 2025-09-10T13:09:23Z
published: 2025-09-10T13:09:23Z
canonical: "kb.isc.org/cve-2025-8696"
---

> ## Documentation Index
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> Use this file to discover all available pages before exploring further.

# CVE-2025-8696: DoS attack against the Stork UI from an unauthenticated user

**CVE:** [CVE-2025-8696](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-8696)

**Title:** DoS attack against the Stork UI from an unauthenticated user

**Document version:** 2.0

**Posting date:** 10 September 2025

**Program impacted:** [Stork](https://www.isc.org/stork/)

**Versions affected:**

Stork

- 1.0.0 -> 2.3.0

**Severity:** High

**Exploitable:** Remotely

**Description:**

If an unauthenticated user sends a large amount of data to the Stork UI, it may cause memory and disk use problems for the system running the Stork server.

**Impact:**

Resource exhaustion. A sufficiently large input will cause Stork to allocate more memory than is available, leading to the failure of the `stork-server` process and/or other processes. Repeated smaller inputs may not exhaust memory but may fill log storage or force premature log rotation.

**CVSS Score:** 7.5

**CVSS Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit: [https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H&version=3.1](https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H&version=3.1).

**Workarounds:**

Placing the Stork server behind a firewall or proxy that only allows access from trusted clients, and/or enforces input size limits, is an effective workaround.

**Active exploits:**

This flaw was discovered in internal testing. We are not aware of any active exploits.

**Solution:**

Upgrade to the patched release most closely related to your current version of Stork:

- 2.2.1
- 2.3.1

**Document revision history:**

- 1.0 Early Notification, 3 September 2025
- 2.0 Public disclosure, 10 September 2025

**Do you still have questions?** Questions regarding this advisory should be mailed to [stork-security@isc.org](mailto:stork-security@isc.org) or posted as confidential GitLab issues at [https://gitlab.isc.org/isc-projects/stork/-/issues/new?issue[confidential]=true](https://gitlab.isc.org/isc-projects/stork/-/issues/new?issue%5Bconfidential%5D=true).

**Note:**

ISC patches only currently supported versions. When possible we indicate EOL versions affected. For current information on which versions are actively supported, please see [https://www.isc.org/download/](https://www.isc.org/download/).

**ISC Security Vulnerability Disclosure Policy:**

Details of our current security advisory policy and practice can be found in the ISC Software Defect and Security Vulnerability Disclosure Policy at [https://kb.isc.org/docs/aa-00861](https://kb.isc.org/docs/aa-00861).

The Knowledgebase article [https://kb.isc.org/docs/cve-2025-8696](https://kb.isc.org/docs/cve-2025-8696) is the complete and official security advisory document.

**Legal Disclaimer:**

Internet Systems Consortium (ISC) is providing this notice on an "AS IS" basis. No warranty or guarantee of any kind is expressed in this notice and none should be implied. ISC expressly excludes and disclaims any warranties regarding this notice or materials referred to in this notice, including, without limitation, any implied warranty of merchantability, fitness for a particular purpose, absence of hidden defects, or of non-infringement. Your use or reliance on this notice or materials referred to in this notice is at your own risk. ISC may change this notice at any time. A stand-alone copy or paraphrase of the text of this document that omits the document URL is an uncontrolled copy. Uncontrolled copies may lack important information, be out of date, or contain factual errors.