Out-of-Bounds Read in Vim (CVE-2026-57451)
Summary
Vulnerability in Vim (CVE-2026-57451). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 9.2.0670 or later.
Original description
The description as published by the source.
Vim is an open source, command line text editor. Prior to 9.2.0670, get_text_props() in src/textprop.c reads a uint16 property count stored inline after a line's text and returns it as the number of 32-byte textprop_T entries that follow. The only check is a floor that guarantees room for a single entry; the count is never checked against the amount of data actually present. A line that declares a large count while carrying little data causes consumers to read far past the end of the line buffer. Such a line can be delivered through a crafted undo file, leading to a crash. This vulnerability is fixed in 9.2.0670.
Source: NIST National Vulnerability Database NVD
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 CVE-2026-57451 has been found in Vim.
Risk of unauthorized operations or information disclosure. CVSS score: 5.3/10.
What to do: upgrade Vim to 9.2.0670 or later.
If unsure, ask your IT team or search "Vim CVE-2026-57451" on the vendor's site.
CVE-2026-57451 (Vim) — CWE-125 / CVSS v3 5.3
Attack vector: local / unauthenticated
Patched: 9.2.0670 — 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.
Out-of-bounds read (CWE-125) exists in Vim.
Check the vendor advisory for the affected versions of Vim.
Severity: Medium (CVSS 5.3/10). Risk of unauthorized operations or information disclosure.
Update to 9.2.0670.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
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
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1Identify 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。 -
2Apply patch patch
Upgrade Vim to 9.2.0670ステージング環境で 9.2.0670 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。
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3Post-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。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Alpine Linux ALPINE-CVE-2026-57451 vim Fixed in: 9.2.0854-r0
- BellSoft Alpaquita BELL-CVE-2026-57451 vim Fixed in: 9.2.0747-r0
- Ubuntu UBUNTU-CVE-2026-57451 vim