CVE-2026-75514
- Source
- https://cve.org/CVERecord?id=CVE-2026-75514
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75514.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-75514
- Aliases
-
- GHSA-q54j-5484-pvjm
- Published
- 2026-08-20T18:31:51Z
- Modified
- 2026-10-28T02:30:54Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- BunkerWeb: rDNS bypass via missing forward-confirmation (FCrDNS) in blacklist, greylist, and antibot
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-350" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75514.json" }- References
-
- https://github.com/bunkerity/bunkerweb/releases/tag/v1.6.13
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75514.json
- https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-q54j-5484-pvjm
- https://nvd.nist.gov/vuln/detail/CVE-2026-75514
- https://github.com/bunkerity/bunkerweb/commit/1a97e5b3f977130a1b84507a9e1f703c8eec12eb
- https://github.com/bunkerity/bunkerweb/pull/3710
Affected packages
Git / github.com/bunkerity/bunkerweb
Affected ranges
- Type
- GIT
- Repo
- https://github.com/bunkerity/bunkerweb
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "1.6.13" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "1a97e5b3f977130a1b84507a9e1f703c8eec12eb" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v1.6.13", "range": [ { "fixed": "2ae80bbbe46e7253fd080df807dceb9d20a60a77" } ], "source": "REFERENCES_TAG" } ] }