{"id":"CVE-2026-12856","aliases":["EUVD-2026-40084","GHSA-7vqr-7r5j-c84j"],"status":"published","title":"Vscode-java: vscode: command injection vulnerability in the javadoc hover provider of the vscode-java extension","description":"A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDoc hover popup, an attacker can execute arbitrary VS Code commands, which can lead to full system compromise in trusted workspaces.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00549,"percentile":0.46402,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-88"],"published":"2026-06-29T12:33:52Z","modified":"2026-10-25T21:10:00Z","products":[{"vendor":"red hat","product":"red hat openshift dev spaces 3.29"},{"vendor":"redhat","product":"openshift_dev_spaces"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:36820","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-12856","tags":["vdb-entry","x_refsource_REDHAT","Mitigation","Vendor Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491278","tags":["issue-tracking","x_refsource_REDHAT","Issue Tracking","Vendor Advisory"]},{"url":"https://github.com/redhat-developer/vscode-java/security/advisories/GHSA-7qv8-6qrw-3crv","tags":["Broken Link"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12856.json","tags":["x_sadp-csaf-vex","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12856"},{"url":"https://github.com/advisories/GHSA-7vqr-7r5j-c84j"}],"sources":{"cve":[{"id":"CVE-2026-12856","title":"Vscode-java: vscode: command injection vulnerability in the javadoc hover provider of the vscode-java extension","description":"A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDoc hover popup, an attacker can execute arbitrary VS Code commands, which can lead to full system compromise in trusted workspaces.","status":"published","published":"2026-06-29T12:33:52.141Z","modified":"2026-07-15T01:22:08.635Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-88","CWE-88"],"updated_at":"2026-11-02T14:19:47.998488Z"}],"euvd":[{"id":"EUVD-2026-40084","description":"A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDoc hover popup, an attacker can execute arbitrary VS Code commands, which can lead to full system compromise in trusted workspaces.","status":"published","published":"2026-06-29T12:33:52Z","modified":"2026-07-15T01:22:08Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:19:55.318488Z"}],"ghsa":[{"id":"GHSA-7vqr-7r5j-c84j","title":"A flaw was found in the vscode-java extension, which provides Java language support for Visual...","description":"A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDoc hover popup, an attacker can execute arbitrary VS Code commands, which can lead to full system compromise in trusted workspaces.","status":"published","published":"2026-06-29T15:32:05Z","modified":"2026-07-08T18:32:34Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T15:09:20.268554Z"}],"nvd":[{"id":"CVE-2026-12856","description":"A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDoc hover popup, an attacker can execute arbitrary VS Code commands, which can lead to full system compromise in trusted workspaces.","status":"published","published":"2026-06-29T14:16:41.473Z","modified":"2026-10-25T21:10:00.77Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T14:12:26.508751Z"}]}}