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CVE-2026-41886
high
CVSS 7.5
Vulnerability in locize (CVE-2026-41886)
Summary
vulnerability in locize (CVE-2026-41886). Data can be tampered with by attackers. Exploitable via ``locize``. Mitigation: upgrade to `4.0.21` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-41886** has been found in locize.
Attackers can target a specific entry point like ``locize`` over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 7.5/10.
What to do: upgrade locize to **4.0.21** or later.
If unsure, ask your IT team or search "locize CVE-2026-41886" on the vendor's site.
CVE-2026-41886 (locize) — CWE-346 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: `locize` / `editKey` / `commitKey` / `commitKeys`
Patched: `4.0.21` — apply immediately
Workaround: No workaround short of upgrading.
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** (CWE-346) exists in locize. Attackers reach the vulnerable code path via ``locize`` without authentication.
📍 Affected scope
locize — . Attack surface: `locize` / `editKey` / `commitKey` / `commitKeys`.
🔥 Severity
Severity: High (CVSS 7.5/10). Data can be tampered with by attackers
🔧 How to fix
Update to **4.0.21**.
🛡️ Workaround
Workaround: No workaround short of upgrading.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'locize' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'locize' . | 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 `locize` を grep し、稼働しているサービス・バージョンを把握する。
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5Apply temporary workaround mitigate
No workaround short of upgrading.パッチが適用されるまでの応急処置として、No workaround short of upgrading. を実施。回避策の副作用 (機能低下) を確認した上で。
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6Apply patch patch
Upgrade locize to 4.0.21ステージング環境で 4.0.21 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と、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
npm
locize
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.0.21"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-41886
- package https://github.com/locize/locize
- web https://github.com/locize/locize/releases/tag/v4.0.21
- web https://github.com/locize/locize/security/advisories/GHSA-w937-fg2h-xhq2
- web https://github.com/locize/locize/commit/d006b75fadb8e8ab77b023e462850fc6e9170735
- web https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage#security_concerns
- web https://github.com/advisories/GHSA-w937-fg2h-xhq2