Vulnerability in vim (UBUNTU-CVE-2026-59856)

Summary

Vulnerability in vim (UBUNTU-CVE-2026-59856). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 2:8.2.3995-1ubuntu2.34 or later.

Original description

The description as published by the source.

Vim is an open source, command line text editor. Prior to 9.2.0736, the PHP omni-completion script in runtime/autoload/phpcomplete.vim interpolates a class or trait name, taken from the contents of the edited buffer, into a search() pattern that is run via win_execute() without escaping. A name containing a single quote can terminate the search() string argument early, and because the bar is honored as an Ex command separator, the remainder of the name is run as Ex commands; via the :! command this allows arbitrary operating-system command execution when a victim opens a crafted PHP file and invokes omni-completion. This issue is fixed in version 9.2.0736.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as UBUNTU-CVE-2026-59856 has been found in vim.
Successful exploitation can lead to full system takeover.
What to do: upgrade vim to 2:8.2.3995-1ubuntu2.34 or later.
If unsure, ask your IT team or search "vim UBUNTU-CVE-2026-59856" on the vendor's site.

UBUNTU-CVE-2026-59856 (vim)
Attack vector: local / unauthenticated
Patched: 2:8.2.3995-1ubuntu2.34 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (unclassified) exists in vim.

📍 Affected scope

Check the vendor advisory for the affected versions of vim.

🔥 Severity

Severity: ?. Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 2:8.2.3995-1ubuntu2.34.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'vim' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
grep -r 'vim' . | grep -v node_modules
```
リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で vim を grep し、稼働しているサービス・バージョンを把握する。
2
Apply patch patch
```
Upgrade vim to 2:8.2.3995-1ubuntu2.34
```
ステージング環境で 2:8.2.3995-1ubuntu2.34 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
3
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

Ubuntu:22.04:LTS vim

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:8.2.3995-1ubuntu2.34"}]}]

Ubuntu:24.04:LTS vim

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.1.0016-1ubuntu7.18"}]}]

Ubuntu:26.04:LTS vim

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.1.2141-1ubuntu4.7"}]}]

References

advisory ubuntu.com
report ubuntu.com
report cve.org
report github.com
report github.com