CVE-2026-9270 is a critical vulnerability in DataDog::DogStatsd versions <=0.07 for Perl, caused by improper neutralization of CRLF sequences (CWE-93) and insufficient input validation (CWE-150). The send_stats method fails to sanitize newlines in metric names ($stat), validate the content of metric values ($delta), and check tags for unsafe characters such as newlines, pipes, and colons. This allows attackers to perform metric injection attacks by supplying malicious input, potentially altering metric data and prefixes. The vulnerability arises from accepting untrusted input without proper sanitization, as exemplified by unsafe usage of user input like a website form parameter as a tag.

An attacker can inject arbitrary metrics or manipulate existing metrics by exploiting the lack of input sanitization and validation in the send_stats method. This can lead to corrupted or misleading metric data, impacting monitoring accuracy and potentially causing incorrect operational decisions based on falsified metrics. The vulnerability does not affect availability but compromises the integrity and confidentiality of metric data.

No official patch or remediation is currently available for this vulnerability. Users should avoid passing untrusted input directly to the send_stats method, especially in metric names, values, or tags. Implement manual sanitization to remove newline characters and validate input before sending metrics. Monitor vendor advisories for updates or patches addressing this issue.