The vulnerability CVE-2026-7045 affects baomidou dynamic-datasource 2.5.0 in the DsSpelExpressionProcessor#doDetermineDatasource method. This method uses Spring's StandardEvaluationContext and SpelExpressionParser to evaluate expressions for datasource determination. Improper input validation or sanitization leads to injection, classified under CWE-74 (Injection) and CWE-707 (Improper Neutralization). The attack can be initiated remotely without user interaction and requires low privileges. The CVSS 4.0 base score is 5.3, indicating medium severity. A patch commit (273fcedaee984c08197c0890f14190b86ab7e0b8) is referenced but no official vendor advisory or patch release is confirmed.

Successful exploitation allows an attacker to perform injection attacks remotely, potentially manipulating datasource selection or behavior within the application. This could lead to unauthorized data access or modification depending on the context of use. The vulnerability requires low privileges and no user interaction, increasing its risk. However, the impact is rated medium due to limited scope and complexity.

A patch commit identifier is referenced, indicating that a fix exists in the code repository. However, no official vendor advisory or patch release is confirmed. It is recommended to apply the referenced patch (commit 273fcedaee984c08197c0890f14190b86ab7e0b8) or upgrade to a version that includes this fix once available. Until then, monitor vendor channels for official updates. No other specific mitigations are documented.