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CVE-2026-75514

BunkerWeb: rDNS bypass via missing forward-confirmation (FCrDNS) in blacklist, greylist, and antibot

BunkerWeb is an open-source, next-generation Web Application Firewall. Prior to 1.6.13, the blacklist, greylist, and antibot modules in src/common/core/blacklist/blacklist.lua, src/common/core/greylist/greylist.lua, and src/common/core/antibot/antibot.lua trust PTR suffix matches in IGNORE_RDNS, GREYLIST_RDNS, and ANTIBOT_IGNORE_RDNS without using get_ips to confirm that the hostname resolves to the client address. An unauthenticated remote attacker who controls a PTR record can spoof a trusted suffix to bypass rDNS-based blacklisting, gain greylist treatment, or skip an antibot challenge. This issue is fixed in version 1.6.13.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Bunkerity
Products
Bunker Web
CVE-2026-61718

bunkerweb: Read-only Web UI users can delete job cache files due to missing authorization on /cache/ routes

bunkerweb is an Open-source and next-generation Web Application Firewall (WAF). From 1.6.2 until 1.6.12, the BunkerWeb web UI BiscuitMiddleware authorization bypass list included the /cache/ URL prefix, so routes in src/ui/app/routes/cache.py protected only by @login_required, including POST /cache/delete, allowed low-privilege read-only reader accounts to permanently delete job cache files containing blacklist, greylist, DNSBL, CrowdSec, GeoIP, ModSecurity CRS, Let's Encrypt, ACME, and custom configuration data. This issue is fixed in version 1.6.12.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Bunkerity
Products
Bunker Web
CVE-2026-54728

bunkerweb: Improper Input Validation and Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in BunkerWeb

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.

CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Bunkerity
Products
Bunker Web
CVE-2025-8066

Bunker Web 1.6.2 - Uncontrolled external site redirect

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Bunkerity Bunker Web on Linux allows Phishing.This issue affects Bunker Web: 1.6.2.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Bunkerity Linux
Products
Bunker Web Linux