Path Traversal in charm.land/wish/v2 (CVE-2026-41589)
Summary
Path traversal in charm.land/wish/v2 (CVE-2026-41589). Confidential information can be exposed externally. Exploitable via main. Mitigation: upgrade to 2.0.1 or later.
Original description
The description as published by the source.
Wish is an SSH server with defaults and a collection of middlewares. From version 2.0.0 to before version 2.0.1, the SCP middleware in charm.land/wish/v2 is vulnerable to path traversal attacks. A malicious SCP client can read arbitrary files from the server, write arbitrary files to the server, and create directories outside the configured root directory by sending crafted filenames containing ../ sequences over the SCP protocol. This issue has been patched in version 2.0.1.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
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-2026-41589 has been found in charm.land/wish/v2.
Attackers can target a specific entry point like main over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 9.6/10.
What to do: upgrade charm.land/wish/v2 to 2.0.1 or later.
If unsure, ask your IT team or search "charm.land/wish/v2 CVE-2026-41589" on the vendor's site.
CVE-2026-41589 (charm.land/wish/v2) — CWE-22 / CVSS v3 9.6
Attack vector: remote (network-reachable) / no user interaction
Attack surface: main / path / filepath.Clean / Glob
Patched: 2.0.1 — 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.
Path traversal (CWE-22) exists in charm.land/wish/v2. Attackers reach the vulnerable code path via main.
Check the vendor advisory for the affected versions of charm.land/wish/v2. Attack surface: main / path / filepath.Clean / Glob.
Severity: Critical (CVSS 9.6/10). Confidential information can be exposed externally.
Update to 2.0.1.
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 'charm.land/wish/v2' . 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 'charm.land/wish/v2' . | 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
charm.land/wish/v2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 charm.land/wish/v2 to 2.0.1ステージング環境で 2.0.1 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。
-
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。
Affected packages
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- web github.com
- web github.com