CVE-2026-40842 Overview
CVE-2026-40842 is a SQL injection vulnerability in the getWidgetTags function. The flaw stems from improper neutralization of special elements in a SQL SELECT command [CWE-89]. A low-privileged remote attacker can exploit this issue over the network without user interaction. Successful exploitation results in a total loss of confidentiality of data accessible through the backend database.
The vulnerability was published to the National Vulnerability Database (NVD) on May 27, 2026, and is tracked through a CERT-VDE Security Advisory.
Critical Impact
Remote attackers with low-privileged access can extract sensitive database contents by injecting crafted SQL through the getWidgetTags function, resulting in complete confidentiality loss.
Affected Products
- Product identified in CERT-VDE Security Advisory VDE-2026-044
- Specific affected versions: Not Available in NVD data
- Refer to the CERT-VDE advisory for the authoritative list of affected components
Discovery Timeline
- 2026-05-27 - CVE-2026-40842 published to NVD
- 2026-05-27 - Last updated in NVD database
Technical Details for CVE-2026-40842
Vulnerability Analysis
The vulnerability resides in the getWidgetTags function, which accepts attacker-controllable input and passes it into a SQL SELECT statement without proper sanitization or parameterization. Because special SQL characters are not neutralized, an attacker can break out of the intended query context and append arbitrary clauses.
The issue is classified under [CWE-89]: Improper Neutralization of Special Elements used in an SQL Command. Although the advisory states the attacker requires low privileges, the issue is described as exploitable in an unauthenticated context for this specific function. Impact is limited to confidentiality, with no integrity or availability consequences indicated by the advisory.
The Exploit Prediction Scoring System (EPSS) data places exploitation likelihood at a low level as of May 28, 2026, and no public proof-of-concept code has been observed.
Root Cause
The root cause is the construction of a SQL query using concatenated or interpolated user input rather than prepared statements with bound parameters. Input passed to getWidgetTags reaches the database layer with special characters such as quotes, semicolons, and comment markers intact.
Attack Vector
The attack vector is network-based. An attacker sends a crafted HTTP request invoking the getWidgetTags function with malicious SQL payloads embedded in the tag-related parameter. The backend executes the modified SELECT statement, returning data the attacker would not normally access. Refer to the CERT-VDE Security Advisory for vendor-confirmed technical details.
No verified exploit code is publicly available at this time.
Detection Methods for CVE-2026-40842
Indicators of Compromise
- HTTP requests targeting the getWidgetTags endpoint containing SQL metacharacters such as single quotes, UNION, SELECT, --, or /*
- Anomalous database query patterns originating from the application's service account, particularly long or nested SELECT statements
- Unexpected outbound data volumes from the application server following requests to the affected function
Detection Strategies
- Deploy web application firewall (WAF) rules that flag SQL injection signatures against requests to the getWidgetTags endpoint
- Enable database query logging and alert on queries containing UNION SELECT or boolean-based injection patterns from the application user
- Correlate application-layer access logs with database audit logs to identify mismatches between expected and executed queries
Monitoring Recommendations
- Monitor the application's error logs for SQL syntax errors, which often indicate injection probing
- Baseline normal query patterns from the application and alert on deviations in volume or structure
- Track repeated requests from the same source IP to the affected function with varying parameter payloads
How to Mitigate CVE-2026-40842
Immediate Actions Required
- Apply the vendor-supplied patch referenced in the CERT-VDE Security Advisory as soon as it is available for your environment
- Restrict network access to the affected application using firewall rules or segmentation until the patch is applied
- Review database audit logs for evidence of prior exploitation against the getWidgetTags function
Patch Information
Consult the CERT-VDE Security Advisory VDE-2026-044 for the authoritative patch information, fixed versions, and vendor remediation instructions. The NVD entry does not list affected version ranges directly.
Workarounds
- Place the affected application behind a WAF configured with SQL injection detection rules tuned to the getWidgetTags parameter
- Apply least-privilege principles to the database account used by the application, restricting SELECT access to only required tables
- If feasible, disable or restrict access to the widget tag functionality until a patch is deployed
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
