CVE-2026-29199
📛 CVE Title
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- hackerone
- CVSS severity
- high
- CVSS score
- 8.1 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N- Effective score
- 8.1 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-640 - Reserved
- 2026-03-04
- Published
- 2026-05-04 07:42 UTC
- Last updated
- 2026-05-04 21:43 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/29xxx/CVE-2026-29199.json
- Linked Threat
- CVE-2026-29199 — CVE-2026-29199
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-04 07:15:59 UTC
- NVD last modified
- 2026-05-07 15:53:49 UTC
- NVD CVSS v3.1
- 8.1 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N- Exploitability subscore
- 2.8 / 10
- Impact subscore
- 5.2 / 10
- EPSS score
- 0.0003 (probability of exploitation in next 30 days)
- EPSS percentile
- 8.94% vs all CVEs — higher = more likely to be exploited, as of 2026-05-25
NVD / KEV / EPSS data refreshed 2026-05-25 17:17 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-26892 - Assigner
- hackerone
- Published
- May 4, 2026, 5:42:15 AM
- Updated
- May 4, 2026, 7:43:18 PM
- EUVD base score (CVSS 3.1)
-
8.1 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - EUVD-reported EPSS
- 0.0300
- Vendors
- phpBB
- Products
-
phpBB (3.0.0 ≤3.3.15)
ENISA 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.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| phpBB | phpBB |
3.0.0 (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
MITRE references (1) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
Web references (3)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://nvd.nist.gov/vuln/detail/CVE-2026-29199 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-29199 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (1)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://hackerone.com/reports/3543246 support@hackerone.com
Remediations (16)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-23 21:16 UTC -
web:cybersecuritynews.com
Microsoft has released its April 2026 Patch Tuesday security update, addressing 168 vulnerabilities across its product portfolio including one actively exploited zero-day and one publicly disclosed flaw that organizations must prioritize immediately.
2026-05-23 21:16 UTC -
web:krebsonsecurity.com
Microsoft expects that exploitation is more likely. May's Patch Tuesday is a welcome respite from April, which saw Microsoft fix a near-record 167 security flaws.
2026-05-23 21:16 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-05-23 21:16 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-23 21:16 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-23 21:16 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-23 21:16 UTC -
web:www.vulncheck.com
In February, VulnCheck introduced our 2025 Routinely Targeted Vulnerabilities list, a compilation of CVEs researched and exploited by a range of threat actors in 2025. Today, we're releasing a list of 2026 vulnerabilities that our analysts have determined qualify for "Routinely Targeted" status based on a combination of threat actor, ransomware, and botnet targeting, along with public ...
2026-05-23 21:16 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-23 21:16 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-23 21:16 UTC -
web:cyberpress.org
Oracle has released its January 2026 Critical Patch Update (CPU), delivering security patches for 337 vulnerabilities across multiple product families. Published through Oracle's Security Alerts portal, the advisory emphasizes the cumulative nature of these patches and strongly recommends immediate deployment across enterprise environments to ...
2026-06-03 07:49 UTC -
web:cybersecuritynews.com
Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.
2026-06-03 07:49 UTC -
web:support.microsoft.com
This Hotpatch update for Windows 11, version 25H2 and 24H2 (KB5089466) includes security improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates. To ...
2026-06-03 07:49 UTC -
web:www.oracle.com
Oracle always recommends that customers remain on actively-supported versions and apply all Security Alerts and Critical Patch Update security patches without delay. Affected Products and Patch Information The security vulnerability addressed by this Security Alert affects the products listed below.
2026-06-03 07:49 UTC -
web:www.securityweek.com
Oracle issues out-of-band updates to patch CVE - 2026 -21992, a critical vulnerability in Identity Manager and Web Services Manager.
2026-06-03 07:49 UTC -
web:www.tenable.com
Oracle addresses 241 CVEs in its April Critical Patch Update, the second quarterly update of 2026 with 481 patches, including 34 critical updates.
2026-06-03 07:49 UTC
AI Forensic Analysis
Only Available for Registered Users. Sign in to view.
Raw JSON
The full cvelistV5 record. Download as CVE-2026-29199.json.
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-29199",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-04T19:42:51.610948Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-04T19:43:18.257Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "phpBB",
"vendor": "phpBB",
"versions": [
{
"lessThanOrEqual": "3.3.15",
"status": "affected",
"version": "3.0.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "SEONG HUN JEONG (HunSec)"
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-640",
"description": "CWE-640 Weak Password Recovery Mechanism for Forgotten Password",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-04T05:42:15.554Z",
"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
"shortName": "hackerone"
},
"references": [
{
"url": "https://hackerone.com/reports/3543246"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
"assignerShortName": "hackerone",
"cveId": "CVE-2026-29199",
"datePublished": "2026-05-04T05:42:15.554Z",
"dateReserved": "2026-03-04T15:00:09.266Z",
"dateUpdated": "2026-05-04T19:43:18.257Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}