CVE-2026-29199_CVE-2026-29199

8.1 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Description

phpBB before 3.3.16 is vulnerable to Host Header Injection that can lead to password rest link poisoning. When force_server_vars is disabled, the servers hostname may be extracted from the HTTP Host header which is used to generate the password reset link URL. An attacker who can manipulate the Host header (e.g. through misconfigured host setup or missing header validation by the webserver) can cause password reset emails to contain a link pointing to an attacker-controlled domain, potentially leading to account takeover.

Basic Information

ID CVE-2026-29199

Source hackerone

Published May 4, 2026 at 05:42

Modified May 4, 2026 at 19:43

Affected Product

Vendor phpBB

Product phpBB

Version 3.0.0

Affected Versions phpBB phpBB 3.0.0

CWE Classification

CWE-640

References

hackerone.com /reports/3543246

{
    "lastseen": "",
    "description": "phpBB before 3.3.16 is vulnerable to Host Header Injection that can lead to password rest link poisoning. When force_server_vars is disabled, the servers hostname may be extracted from the HTTP Host header which is used to generate the password reset link URL. An attacker who can manipulate the Host header (e.g. through misconfigured host setup or missing header validation by the webserver) can cause password reset emails to contain a link pointing to an attacker-controlled domain, potentially leading to account takeover.",
    "published": "2026-05-04T05:42:15.554Z",
    "modified": "2026-05-04T19:43:18.257Z",
    "type": "cve",
    "title": "CVE-2026-29199",
    "source": "hackerone",
    "references": "https://hackerone.com/reports/3543246",
    "id": "CVE-2026-29199",
    "bulletinFamily": "",
    "cwe": [
        "CWE-640"
    ],
    "cvelist": null,
    "sourceData": "phpBB phpBB 3.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 8.1,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "phpBB",
    "version": "3.0.0",
    "vendor": "phpBB",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}