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PatchSiren cyber security CVE debrief

CVE-2026-61718 bunkerity CVE debrief

The BunkerWeb web UI BiscuitMiddleware authorization bypass vulnerability allowed low-privilege reader accounts to permanently delete job cache files containing sensitive configuration data. This issue was fixed in version 1.6.12. The vulnerability affects BunkerWeb versions 1.6.2 through 1.6.11. The vulnerability was reported by a security researcher and fixed by the vendor. The CVE record was published on 2026-07-16T20:16:46.420Z and has not been modified since then.

Vendor
bunkerity
Product
bunkerweb
CVSS
MEDIUM 5.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-16
Original CVE updated
2026-07-17
Advisory published
2026-07-16
Advisory updated
2026-07-17

Who should care

Users of BunkerWeb version 1.6.2 through 1.6.11 should update to version 1.6.12 to fix the authorization bypass vulnerability. This issue affects operators who use BunkerWeb for web application security. Security teams should review the vulnerability and implement compensating controls if necessary.

Technical summary

The BunkerWeb web UI BiscuitMiddleware authorization bypass list included the /cache/ URL prefix, allowing 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 was fixed in version 1.6.12. The vulnerability affects BunkerWeb versions 1.6.2 through 1.6.11.

Defensive priority

Medium priority due to potential impact on configuration data and security posture.

Recommended defensive actions

  • Update BunkerWeb to version 1.6.12 or later
  • Restrict access to the /cache/ URL prefix
  • Monitor for unauthorized changes to job cache files
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Evidence from the CVE record and NVD detail indicate that the vulnerability was fixed in version 1.6.12. The BunkerWeb web UI BiscuitMiddleware authorization bypass vulnerability allowed low-privilege reader accounts to permanently delete job cache files containing sensitive configuration data. This issue was reported by a security researcher and fixed by the vendor. The CVE record was published on 2026-07-16T20:16:46.420Z and has not been modified since then. The vulnerability affects BunkerWeb versions 1.6.2 through 1.6.11.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-61718 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-61718

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-61718 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-61718

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.