Multiple vulnerabilities in Vim, including improper handling of tag resolutions, specialKey commands, and crafted URLs, can lead to denial of service or arbitrary code execution, primarily through user interaction with malicious files. The CVSS scores for three detailed CVEs range from 4.4 to 6.6 (MEDIUM). Affected versions are Vim prior to 9.1.2132 for CVE-2026-25749, prior to 9.1.2148 for CVE-2026-26269, and prior to 9.2.0073 for CVE-2026-28417; users should upgrade to these respective fixed versions.
Rahul Hoysala discovered that Vim did not correctly handle certain tag resolutions. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-25749) It was discovered that Vim did not correctly handle processing certain specialKey commands. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-26269) Kim Dong Han discovered that Vim did not correctly handle opening certain URLs. If a user or system were tricked into opening a specially crafted file, an attacker could possibly use this issue to execute arbitrary code. (CVE-2026-28417) Kim Dong Han discovered that Vim did not correctly handle parsing Emacs-style tag files. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-28418, CVE-2026-28419) Kim Dong Han discovered that Vim did not correctly handle processing maximum combining characters from Unicode supplementary planes. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-28420) Kim Dong Han discovered that Vim did not correctly handle swap file recovery. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-28421) Kim Dong Han discovered that Vim did not correctly handle rendering status lines. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-28422)