CVE-2026-8047
High
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.
SeverityHigh
CVSS7.5
Exploit probability39. percentile0.4%
ProductCODESYS Control RTE (SL)
PublishedMay 26, 2026
First seenMay 26, 2026
Weakness typeCWE-1284CWE-1284
How to fix
Update
- CODESYS CODESYS Control RTE (SL)3.5.22.20 or later
- CODESYS CODESYS Control RTE (for Beckhoff CX) SL3.5.22.20 or later
- CODESYS CODESYS Control Win (SL)3.5.22.20 or later
- CODESYS CODESYS HMI (SL)3.5.22.20 or later
- CODESYS CODESYS Runtime Toolkit3.5.22.20 or later
- CODESYS CODESYS Control for BeagleBone SL4.21.0.0 or later
- CODESYS CODESYS Control for emPC-A/iMX6 SL4.21.0.0 or later
- CODESYS CODESYS Control for IOT2000 SL4.21.0.0 or later
- CODESYS CODESYS Control for Linux ARM SL4.21.0.0 or later
- CODESYS CODESYS Control for Linux SL4.21.0.0 or later
- CODESYS CODESYS Control for PFC100 SL4.21.0.0 or later
- CODESYS CODESYS Control for PFC200 SL4.21.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| CODESYS CODESYS Control RTE (SL) | 3.5.21.0 ≤ v < 3.5.22.20 | 3.5.22.20 |
| CODESYS CODESYS Control RTE (for Beckhoff CX) SL | 3.5.21.0 ≤ v < 3.5.22.20 | 3.5.22.20 |
| CODESYS CODESYS Control Win (SL) | 3.5.21.0 ≤ v < 3.5.22.20 | 3.5.22.20 |
| CODESYS CODESYS HMI (SL) | 3.5.21.0 ≤ v < 3.5.22.20 | 3.5.22.20 |
| CODESYS CODESYS Runtime Toolkit | 3.5.21.0 ≤ v < 3.5.22.20 | 3.5.22.20 |
| CODESYS CODESYS Control for BeagleBone SL | 4.15.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for emPC-A/iMX6 SL | 4.15.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for IOT2000 SL | 4.15.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for Linux ARM SL | 4.15.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for Linux SL | 4.15.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for PFC100 SL | 4.15.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for PFC200 SL | 4.15.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for PLCnext SL | 4.15.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for Raspberry Pi SL | 4.15.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Control for WAGO Touch Panels 600 SL | v < 4.21.0.0 | 4.21.0.0 |
| CODESYS CODESYS Virtual Control SL | 4.15.0.0 ≤ v < 4.21.0.0 | 4.21.0.0 |
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