CVE-2026-40849 Overview
CVE-2026-40849 is a SQL Injection vulnerability [CWE-89] affecting the user_alarmprofile view. The flaw stems from improper neutralization of special elements within a SQL SELECT command. A low-privileged remote attacker can exploit the issue over the network without user interaction. Successful exploitation results in a total loss of confidentiality of database contents accessible through the affected view.
The vulnerability is tracked under CERT@VDE advisory VDE-2026-044. No public exploit, proof-of-concept, or CISA KEV listing is currently associated with this CVE.
Critical Impact
An authenticated attacker with low privileges can extract arbitrary data from the backend database by injecting SQL syntax through the user_alarmprofile view, leading to full confidentiality compromise.
Affected Products
- Product details are not enumerated in the NVD record at publication time
- Refer to CERT@VDE Advisory VDE-2026-044 for the authoritative list of affected vendors and versions
Discovery Timeline
- 2026-05-27 - CVE-2026-40849 published to NVD
- 2026-05-27 - Last updated in NVD database
Technical Details for CVE-2026-40849
Vulnerability Analysis
The vulnerability resides in the user_alarmprofile view, a database object that exposes alarm profile data to application users. The view constructs a SQL SELECT statement using untrusted input without proper escaping or parameterization. Attacker-supplied special characters such as single quotes, semicolons, and SQL keywords are interpreted as syntactic elements rather than literal data.
The network-based attack vector requires authentication, but only at a low privilege level. No user interaction is needed, which makes the flaw suitable for automated exploitation against accessible interfaces. The impact is scoped to confidentiality. Integrity and availability remain unaffected based on the published CVSS metrics.
Root Cause
The root cause is improper neutralization of special elements used in a SQL command [CWE-89]. The affected view concatenates input directly into the query string rather than binding parameters. This pattern allows attacker-controlled data to alter the structure of the executed SELECT statement.
Attack Vector
An authenticated low-privileged attacker submits crafted input through an interface that ultimately queries the user_alarmprofile view. The injected SQL payload extends the original query with UNION SELECT clauses, boolean-based conditions, or time-based probes. The attacker uses the resulting responses to enumerate database schemas and exfiltrate data outside the original authorization scope.
No verified exploit code is publicly available. Technical specifics are described in the CERT@VDE Advisory VDE-2026-044.
Detection Methods for CVE-2026-40849
Indicators of Compromise
- Application or database logs containing SQL meta-characters such as ', --, ;, UNION SELECT, or SLEEP( in requests targeting alarm profile endpoints
- Unusually long query strings or high-volume requests directed at the user_alarmprofile view
- Database errors referencing syntax issues correlated with low-privileged user sessions
Detection Strategies
- Inspect database query logs for unexpected UNION, OR 1=1, or stacked queries originating from the user_alarmprofile view
- Deploy web application firewall (WAF) rules that flag SQL injection patterns against API paths reaching the affected view
- Correlate authentication events with anomalous query volumes from individual low-privileged accounts
Monitoring Recommendations
- Enable verbose database query auditing for views and stored procedures exposed to application users
- Forward application and database logs to a centralized SIEM for retention and analysis
- Establish baselines for normal query patterns against alarm profile data and alert on deviations
How to Mitigate CVE-2026-40849
Immediate Actions Required
- Review the CERT@VDE Advisory VDE-2026-044 and apply vendor-supplied patches once available
- Restrict network access to the affected application to trusted management networks only
- Audit and reduce the number of accounts holding low-privileged access to the affected interface
- Rotate credentials for any account that may have been used to access the user_alarmprofile view
Patch Information
Consult the CERT@VDE Advisory VDE-2026-044 for the authoritative patch status and fixed version information. No fixed version is published in the NVD record at the time of writing.
Workarounds
- Place the affected application behind a WAF configured with SQL injection signatures
- Disable or restrict access to the user_alarmprofile view at the database level for non-administrative roles
- Implement network segmentation to limit reachability of the vulnerable interface from untrusted zones
- Increase logging granularity on the database server to support post-incident forensics
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
