CVE-2026-8047 Out-of-bounds Write in CODESYS Control
Unauthenticated remote attackers can cause a system crash via out-of-bounds write in CODESYS Control HTTP parsing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8047?
CVE-2026-8047 is a high-severity memory corruption vulnerability in CODESYS Control RTE (SL), published on 26 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-1284
Which versions are affected by CVE-2026-8047?
How do I fix CVE-2026-8047?
No fix has been published for CVE-2026-8047 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-8047 being exploited?
There is no known exploitation of CVE-2026-8047 in the wild and no public exploit code.
Sources
Also known as GHSA-x9mr-w23g-rxq7.