CVE-2026-18765 Overview
CVE-2026-18765 is a SQL injection vulnerability affecting Teracity Software Technologies Inc. E-OSB. The flaw stems from improper neutralization of special elements used in SQL commands [CWE-89]. Remote attackers can exploit the issue over the network without authentication or user interaction. Successful exploitation allows attackers to manipulate backend database queries, exposing confidential data, altering records, or disrupting service availability. The vulnerability affects all E-OSB versions prior to V02.26.07.08.01.
Critical Impact
Unauthenticated remote attackers can execute arbitrary SQL statements against the E-OSB database, resulting in full compromise of confidentiality, integrity, and availability.
Affected Products
- Teracity Software Technologies Inc. E-OSB versions before V02.26.07.08.01
Discovery Timeline
- 2026-09-01 - CVE-2026-18765 published to NVD
- 2026-09-01 - Last updated in NVD database
Technical Details for CVE-2026-18765
Vulnerability Analysis
The vulnerability is a SQL injection weakness classified under [CWE-89]. E-OSB fails to properly sanitize or parameterize user-supplied input before incorporating it into SQL statements. Attackers can inject crafted SQL syntax through affected input parameters, causing the database engine to interpret attacker-controlled data as executable query logic. Because the flaw is reachable over the network and requires no privileges or user interaction, exploitation can be automated at scale.
Root Cause
The root cause is the direct concatenation of untrusted input into SQL statements without the use of prepared statements, parameterized queries, or input validation. When user input contains SQL metacharacters such as single quotes, semicolons, or comment markers, the application appends them into the query string. The database then parses the injected fragments as part of the SQL command structure rather than as literal data values.
Attack Vector
Attackers deliver the payload through HTTP requests to E-OSB endpoints that accept user input processed by database queries. No credentials are required. A remote adversary can craft parameters containing SQL clauses such as UNION SELECT statements, boolean-based conditions, or stacked queries. Depending on database privileges, exploitation may enable data extraction, authentication bypass, record modification, or execution of database-level functions that reach the underlying operating system.
See the Siber Güvenlik Notification TR-26-0962 for additional advisory details.
Detection Methods for CVE-2026-18765
Indicators of Compromise
- Web server logs containing SQL syntax such as UNION SELECT, OR 1=1, --, or ; inside request parameters directed at E-OSB endpoints.
- Database error messages returned to clients or logged during requests to E-OSB application URLs.
- Unexpected outbound queries or large result sets originating from the E-OSB database service account.
Detection Strategies
- Deploy web application firewall rules that identify SQL injection payload patterns targeting E-OSB request parameters.
- Enable database query auditing to capture anomalous statements, including queries referencing system tables or metadata schemas.
- Correlate authentication failures, HTTP 500 responses, and long-running queries against E-OSB to surface probing activity.
Monitoring Recommendations
- Monitor E-OSB application logs for repeated malformed requests from single source IP addresses.
- Alert on database sessions executing high-volume SELECT operations against sensitive tables outside normal business patterns.
- Track schema enumeration attempts targeting information_schema or vendor-specific system catalogs.
How to Mitigate CVE-2026-18765
Immediate Actions Required
- Upgrade Teracity E-OSB to version V02.26.07.08.01 or later without delay.
- Restrict network exposure of E-OSB interfaces to trusted networks until patching completes.
- Review database and application logs for indicators of prior exploitation attempts.
Patch Information
Teracity Software Technologies Inc. addressed the vulnerability in E-OSB release V02.26.07.08.01. Administrators should consult the Siber Güvenlik Notification TR-26-0962 advisory and vendor documentation for upgrade procedures.
Workarounds
- Place E-OSB behind a web application firewall configured with SQL injection signatures if immediate patching is not feasible.
- Enforce least-privilege database accounts so the application user cannot access unrelated schemas or execute administrative functions.
- Implement network-level access controls that limit the exposure of E-OSB to authenticated corporate users only.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
