CVE-2026-75514

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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
2026-08-20T18:31:51.527Z
Modified
2026-08-22T03:58:16.748372144Z
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 IGNORERDNS, GREYLISTRDNS, and ANTIBOTIGNORERDNS 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

Affected packages

Git / github.com/bunkerity/bunkerweb

Affected ranges

Type
GIT
Repo
https://github.com/bunkerity/bunkerweb
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1a97e5b3f977130a1b84507a9e1f703c8eec12eb
Fixed
2ae80bbbe46e7253fd080df807dceb9d20a60a77
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.6.13"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*
v1.0.0
v1.1.0
v1.1.1
v1.1.2
v1.2.0
v1.2.1
v1.2.2
v1.2.3
v1.2.4
v1.2.5
v1.2.6
v1.2.7
v1.3.0
v1.3.1
v1.3.2
v1.4.0
v1.4.2
v1.5.0
v1.5.2
v1.5.3
v1.6.0
v1.6.1
v1.6.10
v1.6.11
v1.6.12
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.6.7
v1.6.8
v1.6.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75514.json"