CVE-2026-54728 Code injection in bunkerweb
Authenticated users can escalate privileges via improper Host header validation in BunkerWeb, potentially compromising the WAF instance.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54728?
CVE-2026-54728 is a medium-severity code injection vulnerability in bunkerity bunkerweb, published on 16 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
bunkerweb is an Open-source and next-generation Web Application Firewall (WAF). Prior to BunkerWeb 1.6.12 and BunkerWeb PRO 0.57, authenticated Host header handling in the BunkerWeb UI and API improperly validated and neutralized user-controlled input in a configuration-dependent path, allowing a low-privileged authenticated user to escalate privileges and affect confidentiality, integrity, and availability of the BunkerWeb instance. This issue is fixed in BunkerWeb version 1.6.12 and BunkerWeb PRO version 0.57.
Which versions are affected by CVE-2026-54728?
How do I fix CVE-2026-54728?
No fix has been published for CVE-2026-54728 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-54728 being exploited?
There is no known exploitation of CVE-2026-54728 in the wild and no public exploit code.
Sources
Also known as GHSA-254j-92cv-m443.