CVE: 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
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.
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 or posted as confidential GitLab issues at https://gitlab.isc.org/isc-projects/stork/-/issues/new?issue[confidential]=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/.
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.
The Knowledgebase article https://kb.isc.org/docs/cve-2025-8696 is the complete and official security advisory document.
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