Vulnerability in Anthropic (CVE-2026-44467)
Summary
Vulnerability in Anthropic (CVE-2026-44467). Confidential information can be exposed externally. Mitigation: upgrade to 1.4304.0 or later.
Original description
The description as published by the source.
The Claude Desktop app gives you Claude Code with a graphical interface built for running multiple sessions side by side. From 1.2581.0 to before 1.4304.0, Claude Desktop's SSH remote development feature verified only whether a hostname existed in ~/.ssh/known_hosts without comparing the server's presented host key against the stored key. This allowed a network-positioned attacker to present an arbitrary SSH host key and have the connection silently accepted, enabling a man-in-the-middle attack on remote development sessions. Successful exploitation required the attacker to be in a network position to intercept SSH traffic (e.g., via ARP spoofing, rogue Wi-Fi, or DNS poisoning) and the target hostname to already have an entry in the victim's known_hosts file. This vulnerability is fixed in 1.4304.0.
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-2026-44467 has been found in Anthropic.
Confidential information can be exposed externally. CVSS score: 6.8/10.
What to do: upgrade Anthropic to 1.4304.0 or later.
If unsure, ask your IT team or search "Anthropic CVE-2026-44467" on the vendor's site.
CVE-2026-44467 (Anthropic) — CWE-297 / CVSS v3 6.8
Attack vector: adjacent-network / unauthenticated / no user interaction
Patched: 1.4304.0 — 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.
A vulnerability (CWE-297) exists in Anthropic.
Check the vendor advisory for the affected versions of Anthropic.
Severity: Medium (CVSS 6.8/10). Confidential information can be exposed externally.
Update to 1.4304.0.
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 'Anthropic' . 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 'Anthropic' . | 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
Anthropic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 Anthropic to 1.4304.0ステージング環境で 1.4304.0 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。