GitHub Advisoryadvisory · Packagist

GHSA-7gm6-w7mx-58cr phpBB has Password Reset Link Poisoning via Host Header injection

HIGH Published 2026-05-04 Modified 2026-06-18 Official page ↗
Aliases
CVE-2026-29199
Ecosystem
Packagist
Packages
phpbb/phpbb
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weaknesses
CWE-640
Reviewed
2026-06-18

Affected packages

• Packagist phpbb/phpbb: >= 3.0.0, < 3.3.16 → fixed in 3.3.16 • Packagist phpbb/phpbb: >= 4.0.0-a1, < 4.0.0-a2 → fixed in 4.0.0-a2

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.

Related

Alias · CVE (1)

  • CVE-2026-29199 phpBB before 3.3.16 is vulnerable to Host Header Injection that can lead to password rest link poisoning. vulnerability

Weakness · CWE (1)

  • CWE-640 Weak Password Recovery Mechanism for Forgotten Password weakness

References