Quick Summary
The 2026 API ThreatStats Report by Wallarm highlights that APIs are the most exploited attack surface, with 11,053 API-related vulnerabilities identified in 2025. This represents 17% of all published vulnerabilities, with 43% of CISA KEV additions also being API-related. The report emphasizes that improving API security is crucial for organizations, especially as AI applications increasingly rely on APIs, making the consequences of vulnerabilities more significant.
The Securityish Brief
The 2026 API ThreatStats Report, released by Wallarm, reveals alarming trends in API security. The report analyzed 67,058 published vulnerabilities from 2025 and found that 11,053, or 17%, were related to APIs. Additionally, 43% of the vulnerabilities added to the CISA KEV list in 2025 were also API-related, confirming APIs as the most exploited attack surface.
Wallarm’s findings indicate a significant overlap between AI security and API security, with 2,185 AI-related vulnerabilities identified in 2025, of which 786 were API-related. This means that 36% of AI vulnerabilities involve APIs, highlighting the critical need for organizations to prioritize API security as they adopt AI technologies.
The report also notes that the most common attack methods against APIs involve logic abuse, trust failures, and resource consumption, rather than traditional code defects. For instance, Cross-Site Issues topped the attack volume, while Injections and Broken Access Control remained significant threats.
Another concerning finding is the emergence of Model Context Protocol (MCP) vulnerabilities, which accounted for 14% of all published AI vulnerabilities in 2025. Wallarm identified 315 MCP-related vulnerabilities, with a notable growth of 270% from Q2 to Q3 in 2025, indicating a rapidly evolving risk landscape.
Most API vulnerabilities are characterized by their ease of exploitation; 97% can be exploited with a single request, and 98% are easy or trivial to exploit. Alarmingly, 59% of these vulnerabilities do not require authentication, making them particularly dangerous for organizations.
The report emphasizes that the most damaging breaches are not necessarily caused by sophisticated attackers but rather by repeatable gaps in identity handling and exposed API surfaces. In 2025, AI platforms and tooling accounted for 15% of API-related breaches, underscoring the need for improved security measures.
For security leaders, the key takeaway is clear: enhancing AI security is intrinsically linked to strengthening API security. Organizations must address identity, exposure, and abuse systematically to mitigate risks before they escalate into significant business threats.
- API security is critical for AI applications, as 36% of AI vulnerabilities involve APIs.
- In 2025, 11,053 API-related vulnerabilities were identified, making up 17% of all published vulnerabilities.
- 97% of API vulnerabilities can be exploited with a single request, highlighting the need for robust security measures.
- Wallarm identified 315 MCP-related vulnerabilities in 2025, indicating a new risk area for organizations.
- 15% of API-related breaches in 2025 involved AI platforms and tooling, emphasizing the importance of API security.
Key Takeaways
- Review and enhance your API security protocols to address the identified vulnerabilities.
- Implement real-time monitoring tools to detect and block API attacks effectively.
- Ensure that authentication measures are robust and cover all API endpoints.
- Regularly audit your API usage and access controls to identify potential abuse or trust failures.
- Stay informed about emerging threats and vulnerabilities related to APIs and AI technologies.
Key Terms & Concepts
- API: In this article, an API refers to an application programming interface that allows different software systems to communicate with each other.
- CVE: CVE stands for Common Vulnerabilities and Exposures, which is a list of publicly disclosed cybersecurity vulnerabilities.
- MCP: MCP, or Model Context Protocol, refers to a new control plane risk identified in the report related to API vulnerabilities.
- KEV: KEV stands for Known Exploited Vulnerabilities, which are vulnerabilities that have been publicly disclosed and are actively being exploited.
Read the original article here: https://www.cybersecurity-insiders.com/new-research-reveals-apis-are-the-single-most-exploited-attack-surface/
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