CVE-2026-61718
Received Received - Intake

Authorization Bypass in BunkerWeb Web UI

Publication date: 2026-07-16

Last updated on: 2026-07-16

Assigner: GitHub, Inc.

Description
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.

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Meta Information

Published
2026-07-16
Last Modified
2026-07-16
Generated
2026-07-17
AI Q&A
2026-07-16
EPSS Evaluated
N/A
NVD
CVE-2026-61718
EUVD
EUVD-2026-45032

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
bunkerity bunkerweb From 1.6.2 (inc) to 1.6.11 (inc)
bunkerity bunkerweb 1.6.12
bunkerweb bunkerweb From 1.6.2 (inc) to 1.6.12 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
CWE-285 The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

This vulnerability is an authorization bypass in the BunkerWeb web UI. It allows low-privilege read-only users to delete job cache files containing security-relevant data like blacklist feeds, GeoIP databases, and ModSecurity rules. The issue occurs because the /cache/ URL prefix was incorrectly included in the authorization bypass list, allowing unauthorized write actions on protected routes.

Detection Guidance

Check BunkerWeb version with 'bwcli -v' or 'docker inspect bunkerweb | grep BUNKERWEB_VERSION'. If version is between 1.6.2 and 1.6.11, the system is vulnerable. Inspect UI accounts with 'bwcli user list' to identify non-admin accounts that could exploit this.

Impact Analysis

An attacker with a read-only UI account could delete cache files, disrupting WAF operations and potentially weakening security protections. This could lead to reduced threat detection, increased false positives, or service disruptions. The impact is limited to users who created non-admin accounts, as default installations are not vulnerable.

Compliance Impact

This vulnerability could impact compliance by allowing unauthorized deletion of security-relevant data like blacklist feeds and GeoIP databases. Such actions might violate data integrity requirements under GDPR or HIPAA, especially if the deleted data includes logs or configurations necessary for audit trails or security monitoring.

Mitigation Strategies

Upgrade BunkerWeb to version 1.6.12 or later immediately. Avoid creating non-admin UI accounts until upgraded. Restrict web UI access to trusted networks or IPs to reduce exposure.

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