CVE-2026-2731 Unauthenticated RCE in Dynamicweb 9 and Dynamicweb 8
Unauthenticated attackers can execute arbitrary code via path traversal in Dynamicweb CMS, requiring immediate patching.
- 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-2026-2731?
CVE-2026-2731 is a critical path traversal vulnerability in DynamicWeb 9, published on 19 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Path traversal and content injection in JobRunnerBackground.aspx in DynamicWeb 8 (all) and 9 (<9.19.7 and <9.20.3) allows unauthenticated attackers to execute code via simple web requests
Weakness: CWE-22
Which versions are affected by CVE-2026-2731?
How do I fix CVE-2026-2731?
No fix has been published for CVE-2026-2731 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-2731 being exploited?
There is no known exploitation of CVE-2026-2731 in the wild and no public exploit code.
Sources
Also known as GHSA-r435-hw3q-c6g9.