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PHP CVE-2026-34184

| EUVDEUVD-2026-20884 HIGH
Missing Authorization (CWE-862)
2026-04-09 CERT-PL GHSA-hh72-xj72-2c38
PHP Authentication Bypass
8.8
CVSS 4.0 · NVD
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Severity by source

NVD PRIMARY
8.8 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

7
Re-analysis Queued
Apr 20, 2026 - 17:07 vuln.today
cvss_changed
Analysis Updated
Apr 16, 2026 - 06:00 EUVD-patch-fix
executive_summary
Re-analysis Queued
Apr 16, 2026 - 05:29 backfill_euvd_patch
patch_released
Patch available
Apr 16, 2026 - 05:29 EUVD
9.8.5
EUVD ID Assigned
Apr 09, 2026 - 10:00 euvd
EUVD-2026-20884
Analysis Generated
Apr 09, 2026 - 10:00 vuln.today
CVE Published
Apr 09, 2026 - 09:41 nvd
HIGH 8.8

DescriptionCVE.org

Hydrosystem Control System does not enforce authorization for some directories. This allows an unauthorized attacker to read all files in these directories and even execute some of them. Critically the attacker could run PHP scripts directly on the connected database.This issue was fixed in Hydrosystem Control System version 9.8.5

AnalysisAI

Unauthorized access to directories in Hydrosystem Control System versions prior to 9.8.5 allows unauthenticated remote attackers to read arbitrary files and execute PHP scripts directly against the connected database. Missing authorization enforcement on specific directories enables direct file access and code execution without authentication, creating critical exposure for database manipulation and data exfiltration. No public exploit identified at time of analysis.

Technical ContextAI

CWE-862 missing authorization vulnerability permits direct filesystem access to unprotected directories. CVSS vector PR:N confirms unauthenticated network-based exploitation. Vulnerability allows PHP script execution with database access privileges, bypassing application-layer access controls entirely through direct file requests.

RemediationAI

Vendor-released patch: Hydrosystem Control System version 9.8.5. Immediately upgrade all instances to version 9.8.5 or later to enforce proper directory-level authorization controls. Until patching is completed, implement network-level access restrictions to limit exposure exclusively to authenticated administrative networks using firewall rules or VPN requirements. Review web server configuration to explicitly deny direct access to PHP files outside designated application entry points. Conduct database access log review for unauthorized query activity. Reference vendor advisory at https://www.hydrosystem.poznan.pl/ and detailed analysis at https://cert.pl/posts/2026/04/CVE-2026-4901/ for implementation guidance.

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CVE-2026-34184 vulnerability details – vuln.today
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