CISA Adds Ray AI Framework Flaw CVE-2025-62593 to KEV Catalog After Confirmed Exploitation
US cybersecurity authorities have warned that a vulnerability in the Ray framework for scaling AI and Python applications is being actively exploited in the wild. The CISA added CVE-2025-62593 to its Known Exploited Vulnerabilities catalog on August 17, 2026, highlighting the risk of remote code execution via common web browsers.
The flaw affects Firefox and Safari and can be triggered when a user visits a page containing malicious advertisements. Attackers may combine the issue with DNS rebinding techniques to achieve code injection against Ray instances running in development environments. The vulnerability received a CVSS v4.0 base score of 9.4 and is rated Critical.
Ray version 2.52.0, released after the November 2025 disclosure, contains the fix. Proof-of-concept code has been publicly available, increasing the likelihood of further exploitation. CISA has instructed US federal agencies to implement mitigations no later than August 20, 2026.
Organizations that rely on Ray for distributed AI workloads are advised to confirm they are running the patched release and to review browser usage in development and test environments. The advisory underscores the expanding attack surface created when AI frameworks interact with standard web browsers.
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