CVE-2026-4511 is a security vulnerability identified in the vanna-ai vanna software, specifically affecting versions 2.0.0 through 2.0.2. The vulnerability resides in the exec function located in the /src/vanna/legacy file, where improper input handling leads to injection attacks. This injection flaw allows an attacker to remotely execute arbitrary commands or code by manipulating inputs to the vulnerable function. The attack vector is network-based (AV:N), requiring no authentication (PR:L indicates low privileges but AT:N means no authentication needed) or user interaction, making it easier to exploit. The vulnerability impacts confidentiality, integrity, and availability to a limited extent (VC:L, VI:L, VA:L), and does not require special conditions such as scope changes or security controls bypass. The CVSS 4.0 score is 5.3, reflecting a medium severity level. The vendor was contacted early but has not responded or provided patches, and while public exploit details have been disclosed, there are no confirmed reports of active exploitation in the wild. This vulnerability poses a risk to any deployment of the affected vanna-ai vanna versions, especially in environments exposed to untrusted networks.

The vulnerability allows remote attackers to perform injection attacks that could lead to unauthorized command execution, potentially compromising system confidentiality, integrity, and availability. Exploitation could enable attackers to execute arbitrary code, manipulate data, disrupt services, or pivot within affected environments. Organizations relying on vanna-ai vanna versions 2.0.0 to 2.0.2 face risks of data breaches, service outages, and unauthorized access. The lack of vendor response and patches increases exposure duration, raising the risk of exploitation as public exploit information is available. While no active exploitation is currently known, the ease of remote exploitation without authentication elevates the threat level. This could impact organizations in sectors where vanna-ai vanna is deployed, including technology, research, and any industry using this AI tool, potentially affecting operational continuity and data security.

Organizations should immediately assess their use of vanna-ai vanna versions 2.0.0 through 2.0.2 and isolate affected instances from untrusted networks to reduce exposure. Implement strict network-level access controls and firewall rules to limit inbound traffic to trusted sources. Monitor logs and network traffic for suspicious activity targeting the exec function or unusual command execution patterns. Employ application-layer filtering or web application firewalls (WAFs) to detect and block injection attempts targeting the vulnerable endpoint. If possible, disable or restrict the vulnerable exec function or legacy components until a vendor patch or official mitigation is available. Engage with the vendor for updates and consider alternative solutions if remediation is delayed. Conduct regular security assessments and penetration tests focusing on injection vulnerabilities. Maintain up-to-date backups and incident response plans to mitigate potential impacts of exploitation.