CVE-2026-32249: Vim

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state->out1->out without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.

Affected products

• Vim Vim: from 9.1.0011, before 9.2.0137 (fixed in 9.2.0137)

Published 2026-03-12. Last modified 2026-07-23.