CVE-2026-1188 identifies a buffer overflow vulnerability in the Eclipse OMR port library component, specifically in an API function responsible for returning textual names of all supported processor features. Since release 0.2.0, this function incorrectly calculates the required buffer size by neglecting to account for the separators inserted between processor feature names. When a caller provides an output buffer sized without considering these separators, the function may write beyond the buffer boundary, leading to a buffer overflow condition. This can cause memory corruption, potentially resulting in application crashes, data corruption, or arbitrary code execution depending on the context in which the API is used. The vulnerability is remotely exploitable without authentication or user interaction, increasing its risk profile. However, the impact on confidentiality, integrity, and availability is assessed as limited to low, given the controlled scope and lack of known exploits. The issue was resolved in Eclipse OMR version 0.8.0 by correcting the buffer size calculation logic. Eclipse OMR is a foundational runtime component used in various software projects, including those related to Java virtual machines and other runtime environments, making this vulnerability relevant to organizations relying on these technologies. No public exploits have been reported, but the vulnerability's presence in foundational software warrants proactive remediation.

For European organizations, the primary impact of CVE-2026-1188 lies in potential memory corruption within applications or systems that incorporate the vulnerable Eclipse OMR versions. This could lead to application instability, denial of service, or in worst cases, arbitrary code execution if exploited in a suitable context. Organizations involved in software development, runtime environment deployment, or those using Eclipse OMR as part of their infrastructure may face increased risk. Critical sectors such as finance, manufacturing, and telecommunications, which often rely on Java-based or other runtime environments utilizing Eclipse OMR, could experience operational disruptions or security breaches if this vulnerability is exploited. Although no active exploits are known, the medium severity rating and remote exploitability without authentication mean that attackers could leverage this flaw to compromise systems, especially if combined with other vulnerabilities. The vulnerability could also affect software supply chains, where compromised runtime components propagate risks downstream. Therefore, European entities should consider this vulnerability a moderate threat to their software integrity and operational continuity.

The primary mitigation is to upgrade all instances of Eclipse OMR to version 0.8.0 or later, where the buffer size calculation flaw has been corrected. Organizations should conduct an inventory of software and systems using Eclipse OMR to identify affected versions. For environments where immediate upgrade is not feasible, implementing strict input validation and buffer size checks around the vulnerable API calls can reduce risk. Additionally, applying runtime protections such as Address Space Layout Randomization (ASLR), Data Execution Prevention (DEP), and stack canaries can help mitigate exploitation impact. Security teams should monitor for unusual application crashes or memory corruption signs that could indicate exploitation attempts. Incorporating static and dynamic code analysis tools to detect buffer overflows in custom integrations with Eclipse OMR is recommended. Finally, organizations should maintain up-to-date threat intelligence feeds to quickly respond if exploit code emerges.