CVE-2026-73071

Vim: Use-after-free in JSON Decoding

Published: Aug 11, 2026Updated: Sep 9, 2026 Sources: CVE List NVDCWE-416

3.3LOW

Description

Vim is an open source, command line text editor. From 9.2.0511 until 9.2.0844, json_decode_item() in src/json.c can retain a stale pointer after json_decode_string() invokes channel_fill() to refill and free the current buffer, causing the error path to read freed memory instead of reader->js_buf + reader->js_used when an invalid JSON string spans buffers. This issue is fixed in version 9.2.0844.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:LAttack Vector

Local

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:LAvailability

Low

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Weaknesses

CWE-416

Affected Products

vim

oss-projectaka gvim, vim/vim, vi

vimOn-premDesktop App

Consumer Software / file-utility

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

Privilege Escalation

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References

https://github.com/vim/vim/security/advisories/GHSA-69ch-22ch-r887

github.com

https://github.com/vim/vim/commit/f8126294a526aa80c5123eb3079e325daee9ec75

github.com

https://github.com/vim/vim/releases/tag/v9.2.0844

github.com

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