SB2026081786 - Multiple vulnerabilities in IntelliJ IDEA

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper Neutralization of Special Elements Used in a Template Engine (CVE-ID: CVE-2026-49382)

CWE-ID: CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to template injection in the Copyright plugin when processing crafted templates. A remote user can inject malicious template content to execute arbitrary code.

2) XML External Entity injection (CVE-ID: CVE-2026-49383)

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to XML external entity processing in UI Designer form parser when parsing a crafted form file. A local user can supply a specially crafted form file to disclose sensitive information.

Remediation

Install update from vendor's website.

References

• https://www.jetbrains.com/privacy-security/issues-fixed/#9973374357362f9f1197d3fc6b9f1a2c
• https://www.jetbrains.com/privacy-security/issues-fixed/#ac695ca405bfe6e6aebcfed2e3069b36