CVE-2026-61718: bunkerweb: Read-only Web UI users can delete job cache files due to missing authorization on /cache/ routes
Vulnerability summary
CVE-2026-61718 is a medium (CVSS 5.4) Improper Authorization vulnerability in bunkerity bunkerweb. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 37.2% of scored vulnerabilities.
Not severe (CVSS 5.4, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Timeline
- 16-07-2026PublishedVulnerability first disclosed.
- 17-07-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
EPSS trend
Probability
0.43%
Chance of exploitation in the next 30 days
Percentile
37%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.43% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-285Improper AuthorizationThe product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
- CWE-862Missing AuthorizationThe product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Affected systems
Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Bunkerity1 product
- bunkerweb≥ 1.6.2, < 1.6.12
1 vendor · 1 product
References
3 links- github.com/bunkerity/bunkerweb/security/advisories/GHSA-q7rm-935c-v39gX Refsource CONFIRM
- github.com/bunkerity/bunkerweb/releases/tag/v1.6.12X Refsource MISC