High severity8.1NVD Advisory· Published May 4, 2026· Updated May 29, 2026
CVE-2026-29199
CVE-2026-29199
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
phpbb/phpbbPackagist | >= 3.0.0, < 3.3.16 | 3.3.16 |
phpbb/phpbbPackagist | >= 4.0.0-a1, < 4.0.0-a2 | 4.0.0-a2 |
Affected products
2Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-7gm6-w7mx-58crghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-29199ghsaADVISORY
- blog.phpbb.com/2026/04/27/phpbb-4-0-0-a2-releaseghsaWEB
- hackerone.com/reports/3543246nvdPermissions RequiredWEB
- www.phpbb.com/community/viewtopic.phpghsaWEB
News mentions
0No linked articles in our index yet.