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CVE-2026-73489
medium
CVSS 4.3
Vulnerability in russh (CVE-2026-73489)
Summary
vulnerability in russh (CVE-2026-73489). Risk of unauthorized operations or information disclosure. Exploitable via ``russh``. Mitigation: upgrade to `0.61.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-73489** has been found in russh.
Attackers can target a specific entry point like ``russh`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 4.3/10.
What to do: upgrade russh to **0.61.0** or later.
If unsure, ask your IT team or search "russh CVE-2026-73489" on the vendor's site.
CVE-2026-73489 (russh) — CWE-129 / CVSS v3 4.3
Attack vector: remote (network-reachable) / no user interaction
Attack surface: `russh` / `c4be19f1915c8682f4615c3fd50008512b474491` / `main` / `pty_request`
Patched: `0.61.0` — 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** (CWE-129) exists in russh. Attackers reach the vulnerable code path via ``russh`` without authentication.
📍 Affected scope
russh — . Attack surface: `russh` / `c4be19f1915c8682f4615c3fd50008512b474491` / `main` / `pty_request`.
🔥 Severity
Severity: Medium (CVSS 4.3/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **0.61.0**.
🛡️ 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 'russh' .` 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 'russh' . | 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 `russh` 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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6Apply patch patch
Upgrade russh to 0.61.0ステージング環境で 0.61.0 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
rust
russh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.62.4"}]}]