CVE-2026-64814: 
JetBrains IntelliJ IDEA vulnerability analysis and mitigation

CVE-2026-64814 is an unauthorized file access vulnerability in JetBrains IntelliJ IDEA affecting all versions before 2026.2. The flaw allows unauthenticated network attackers to access files without authorization during a Remote Development session. It was disclosed by JetBrains on July 23, 2026, and received an initial NVD analysis on July 28, 2026. The vulnerability carries a CVSS v3.1 base score of 8.6 (High), assigned by JetBrains (JetBrains Advisory, NVD).

The root cause is classified as CWE-862 (Missing Authorization), meaning the Remote Development session component fails to enforce proper access controls before serving file content to requesting clients. An unauthenticated attacker over the network can exploit this by interacting with the Remote Development session endpoint without supplying valid credentials, bypassing authorization checks entirely. The attack requires no user interaction, no privileges, and has low complexity, making it automatable according to CISA's SSVC assessment. No public technical write-up or proof-of-concept code has been identified at this time (JetBrains Advisory, NVD).

Successful exploitation results in high confidentiality impact with a changed scope, meaning an attacker can read files beyond the immediate session boundary — potentially accessing sensitive source code, credentials, configuration files, or other data stored on the remote development host. Integrity and availability are not directly affected by this vulnerability. In developer environments, exposed files could include API keys, private keys, or internal application logic, enabling further lateral movement or supply chain compromise (NVD, Feedly).

No public proof-of-concept exploit or evidence of in-the-wild exploitation has been observed as of the time of reporting. CISA's SSVC assessment classifies exploitation as "none" and the attack as automatable with partial technical impact. The EPSS score is approximately 0.315%, indicating a low but non-negligible probability of exploitation in the near term. The vulnerability is not listed in CISA's Known Exploited Vulnerabilities (KEV) catalog (NVD).

JetBrains has released a fix in IntelliJ IDEA version 2026.2; upgrading to this version or later is the recommended remediation. Organizations unable to patch immediately should restrict network access to Remote Development sessions to trusted networks only, using firewall rules or VPN controls. Disabling the Remote Development feature entirely is advised if it is not actively required (JetBrains Advisory).

Security news outlets including CyberPress, CybersecurityNews, and SecurityOnline covered the vulnerability as part of a broader wave of critical JetBrains patches affecting IntelliJ IDEA and TeamCity. Community discussion on Bluesky and threat intelligence digests (e.g., Hawk-Eye weekly digest) noted the high CVSS score and the unauthenticated network attack vector as particularly concerning for developer environments. No significant vendor statements beyond the official advisory have been identified (CyberPress, CybersecurityNews, SecurityOnline).