CVE-2026-55693

Vim is an open source, command line text editor. Prior to 9.2.0653, the tree_count_words() function in src/spellfile.c fills in the word-count fields of a spell-file word trie by walking it iteratively with a depth counter. The counter is bounded only by the trie structure itself; it is never checked against the size of the fixed MAXWLEN-element stack arrays it indexes (arridx[], curi[], wordcount[]). A crafted .spl/.sug file pair, loaded when the user invokes spell suggestion, can drive the descent arbitrarily deep, so the function writes past the end of those arrays. This is a stack out-of-bounds write that corrupts the call frame and crashes the editor. This vulnerability is fixed in 9.2.0653.

• CWE-787

• https://github.com/vim/vim/commit/a80874d9b84a01040e3d1aef2d4a59e1934dafb7Patch
• https://github.com/vim/vim/releases/tag/v9.2.0653Product
• https://github.com/vim/vim/security/advisories/GHSA-wgh4-64f7-q3jqVendor Advisory

Published

Jun 25, 2026

Last Modified

Jun 26, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-55688The AsyncHttpClient (AHC) library allows Java applications t…4
• CVE-2026-55689OpenFGA is an authorization/permission engine built for deve…8.1
• CVE-2026-5569A vulnerability was found in Technostrobe HI-LED-WR120-G2 5.…9.8
• CVE-2026-55690The EmbedVideo Extension is a MediaWiki extension which adds…7.5
• CVE-2026-55691The EmbedVideo Extension is a MediaWiki extension which adds…8.6
• CVE-2026-55692The EmbedVideo Extension is a MediaWiki extension which adds…7.5
• CVE-2026-55694Snipe-IT is an IT asset/license management system. Prior to …7.1
• CVE-2026-55696PrivateBin is an online pastebin where the server has zero k…4.3
• CVE-2026-55697pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm…8.8
• CVE-2026-55698pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm…8.8
• CVE-2026-55699pnpm is a package manager. Prior to 10.34.2 and 11.5.3, Mani…6.5
• CVE-2026-5570A vulnerability was determined in Technostrobe HI-LED-WR120-…9.8