CVE-2026-8047 Details
Description
The affected products perform improper length checking when parsing incoming HTTP requests, resulting in a size-limited out-of-bounds write. An unauthenticated remote attacker can exploit this flaw to cause a denial of service via a system crash on the affected device.
A size-limited out-of-bounds write vulnerability has been identified in the CODESYS Control Runtime's CmpWebServer component. This issue arises from improper length checking when parsing incoming HTTP requests. An unauthenticated remote attacker can exploit this vulnerability to cause a system crash, leading to a denial-of-service condition on the affected device. The vulnerability is present in several CODESYS Control Runtime versions, but only when the web server is active, which typically requires a running application with Web Visualization enabled.
Users can update to version 3.5.22.20 for CODESYS Control RTE (SL), CODESYS Control RTE (for Beckhoff CX) SL, CODESYS Control Win (SL), CODESYS HMI (SL), and CODESYS Runtime Toolkit. For CODESYS Control for BeagleBone SL, CODESYS Control for emPC-A/iMX6 SL, CODESYS Control for IOT2000 SL, CODESYS Control for Linux ARM SL, CODESYS Control for Linux SL, CODESYS Control for PFC100 SL, CODESYS Control for PFC200 SL, CODESYS Control for PLCnext SL, CODESYS Control for Raspberry Pi SL, CODESYS Control for WAGO Touch Panels 600 SL, and CODESYS Virtual Control SL, the update to version 4.21.0.0 is expected in June 2026.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 26, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.certvde.com/en/advisories/VDE-2026-057/ | [email protected] |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1284 | Improper Validation of Specified Quantity in Input | [email protected] |
Affected Products
No affected product data is available for this CVE.
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 26, 2026 | New CVE Received | [email protected] |