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VULNERABILITIES

CVE-2026-29199 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://hackerone.com/reports/3543246 [email protected]Permissions Required

Weakness Enumeration

CWE-IDCWE NameSource
CWE-640Weak Password Recovery Mechanism for Forgotten Password[email protected]

Affected Products

ProductVersions
phpbb phpbb
< 3.3.16

CPE

  • cpe:2.3:a:phpbb:phpbb:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-29199
NVD Published Date:
May 4, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-29199 Details - Not Deferred