PatchTheCVECVE-2026-52859: Vim is an open source, command line text editor
CVE-2026-52859 is a high-severity flaw (CVSS 8.2) affecting vim. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 m
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.2 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 77%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2026-06-11 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-52859?
vim: upgrade to 9.2.0565. Exact commands for each OS are on this page.
Is CVE-2026-52859 being exploited?
CVE-2026-52859 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-52859 affect?
CVE-2026-52859 affects vim. Severity is high (CVSS 8.2). 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 wal
How urgent is CVE-2026-52859?
Priority 39/100. High severity; Remotely exploitable, no login, no user action
Software pages
Related CVEs
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- CVE-2026-51401 HIGH 7.7 UPGRADE An issue in Vim Project v9.2.0389 and earlier allows a local attacker to execute arbitrary code via the vms_fi
- CVE-2026-34982 HIGH 8.2 UPGRADE Vim is an open source, command line text editor
- CVE-2026-73071 LOW 3.3 UPGRADE Vim is an open source, command line text editor
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