CVE-2026-52859
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
In Vim, prior to version 9.2.0565, the update_snapshot() function in src/terminal.c copied the visible terminal screen into the scrollback buffer, which could lead to out-of-bounds array access. As a result, a program rendered inside a :terminal window could trigger a crash.
Risk Assessment
Organizations may experience crashes of the Vim editor, potentially leading to data loss or work interruptions. In particular, applications running in the terminal may be susceptible to unforeseen issues.
Recommendation
It is recommended to update Vim to version 9.2.0565 or later to mitigate this vulnerability. Additionally, monitoring applications running in the terminal may help identify potential issues.
Other vulnerabilities in Vim
See all- CVE-2017-11109High
Vim 8.0 allows attackers to cause a denial of service (invalid free) or possibly have unspecified other impact via a crafted source (aka -S) file.
- CVE-2016-1248High
Vim before patch 8.0.0056 does not properly validate values for the 'filetype', 'syntax', and 'keymap' options, which may result in the execution of arbitrary code if a file with a specially crafted modeline is opened.
- CVE-2024-43802Medium
Vim is an improved version of the Unix vi text editor. When flushing the typeahead buffer, Vim moves the current position in the typeahead buffer but does not check whether there is enough space left in the buffer to handle the next characters. This may lead to the tb_off position within the buffer being out of bounds.
- CVE-2024-47814Low
In Vim before 9.1.0764, a use-after-free occurs when closing a buffer and a BufWinLeave auto command reopens the same buffer in a new split window.
- CVE-2026-34714Critical
A vulnerability in Vim before version 9.2.0272 allows immediate code execution upon opening a crafted file in the default configuration. The issue is due to %{expr} injection in tabpanel lacking the P_MLE flag.
- CVE-2017-6350Critical
An integer overflow at an unserialize_uep memory allocation site occurs for vim before patch 8.0.0378, if it does not properly validate values for tree length when reading a corrupted undo file, which may lead to resultant buffer overflows.
- CVE-2017-6349Critical
An integer overflow at a u_read_undo memory allocation site would occur for vim before patch 8.0.0377, if it does not properly validate values for tree length when reading a corrupted undo file, which may lead to resultant buffer overflows.
- CVE-2017-5953Critical
Vim before patch 8.0.0322 does not properly validate values for tree length when handling a spell file, which may result in an integer overflow at a memory allocation site and a resultant buffer overflow.
- CVE-2026-43961High
Vim's netrw plugin contains a vulnerability that allows arbitrary Vimscript execution via a crafted filename with quote characters and expression fragments. This can lead to shell command execution with the privileges of the user running Vim.
- CVE-2026-73073High
Vim prior to 9.2.0845 has a vulnerability in StructMembers() in runtime/autoload/ccomplete.vim, which constructs and executes a vimgrep command using an insufficiently escaped typeref: or typename: value from a tags file, allowing an unterminated collection followed by a command separator to execute arbitrary Ex and operating-system commands when a user invokes C omni-completion with CTRL-X CTRL-O on a member access whose type is resolved from that tags file. This issue is fixed in version 9.2.0845.
Original NVD description (English source)
Vim is an open source, command line text editor. Prior to version 9.2.0565, the update_snapshot() function in src/terminal.c copies the visible terminal screen into the scrollback buffer when a snapshot is taken. For each screen cell it walks the cell's chars[] array with no upper bound, stopping only when it encounters a NUL terminator. When a cell legitimately fills all VTERM_MAX_CHARS_PER_CELL (6) slots — a base character plus five combining marks — the bundled libvterm returns the array without a terminating NUL, so the loop reads past the fixed six-element array and appends the out-of-bounds values to a buffer reserved for only six characters. A program whose output is rendered inside a :terminal window can trigger this with a short byte sequence and no Vim scripting, leading to a crash. This issue has been patched in version 9.2.0565.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS