{"id":"CVE-2026-75514","title":"BunkerWeb is an open-source, next-generation Web Application Firewall","summary":"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/a…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-350"],"published":"2026-08-20","updated":"2026-09-18","sourceUpdated":"2026-09-18T20:09:01.757","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-75514","references":[{"url":"https://github.com/bunkerity/bunkerweb/commit/1a97e5b3f977130a1b84507a9e1f703c8eec12eb","label":"security-advisories@github.com"},{"url":"https://github.com/bunkerity/bunkerweb/pull/3710","label":"security-advisories@github.com"},{"url":"https://github.com/bunkerity/bunkerweb/releases/tag/v1.6.13","label":"security-advisories@github.com"},{"url":"https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-q54j-5484-pvjm","label":"security-advisories@github.com"},{"url":"https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-q54j-5484-pvjm","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00597,"epssPercentile":0.46241,"ingestedAt":"2026-09-18T20:51:25.644Z","slug":"CVE-2026-75514","body":"## Overview\n\nBunkerWeb 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":32.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}