What’s Vulnerable › Vulnerabilities

CVE-2026-73075: Vim: Out-of-bounds Access in Popup Opacity Handling

• Severity: low (CVSS 3.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-11 · updated 2026-10-06
• Weakness: CWE-124

Description

Vim is an open source, command line text editor. From 9.2.0469 until 9.2.0843, popup_mark_opacity_zindex() in src/popupwin.c can use a negative w_winrow for a text-property-anchored popup with clipwindow and opacity, indexing before the screen array instead of accounting for w_popup_topoff and causing an out-of-bounds read and conditional write. This issue is fixed in version 9.2.0843.

Affected products

• vim/vim: from 9.2.0469 before 9.2.0843 — fixed in 9.2.0843

How to fix

Upgrade to a fixed version: vim/vim 9.2.0843. Check the vendor advisory for mitigations.

References

• https://github.com/vim/vim/security/advisories/GHSA-pmvp-6rcj-98p4
• https://github.com/vim/vim/security/advisories/GHSA-pmvp-6rcj-98p4
• https://github.com/vim/vim/security/advisories/GHSA-pmvp-6rcj-98p4
• https://github.com/vim/vim/security/advisories/GHSA-pmvp-6rcj-98p4

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