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.
Casky was already ahead
This CVE exploits attack patterns that Casky's 331matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.
The Wish SSH server's SCP middleware (versions 2.0.0 through 2.0.0) contains a critical path traversal vulnerability that allows malicious SCP clients to bypass directory restrictions. By crafting filenames with ../ sequences, attackers can read arbitrary files from the server, write malicious files to any location, and create directories outside the configured root directory. This vulnerability is particularly dangerous because SCP is a widely-used protocol for secure file transfer, and organizations relying on Wish as an SSH solution may unknowingly expose sensitive data or allow unauthorized code execution. The 9.6 CVSS score reflects the severity: unauthenticated attackers can achieve near-complete system compromise without requiring elevated privileges.
Casky's 331 matching skills detect this attack through Claude's extended reasoning across MITRE ATT&CK's initial access (TA0001) and discovery (TA0007) techniques. When analyzing SCP traffic, practitioners would observe detection signals for path traversal payloads—filenames containing suspicious ../ patterns, attempts to access files outside designated directories, and unusual SCP command sequences. The platform maps these indicators to CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) and flags reconnaissance activities where attackers probe directory structures or attempt file exfiltration. Practitioners would see alerts for anomalous file write operations targeting sensitive system paths, combined with indicators of unauthorized directory creation—enabling them to identify and block exploitation attempts before files are compromised.
Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →
These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-41589.
Casky has 331 skills that investigate the attack patterns behind CVE-2026-41589. Run one and get CVSS-scored findings in 3 minutes.
Run the skill that detects this →analyzing-office365-audit-logs-for-compromise
cloud security · low
analyzing-persistence-mechanisms-in-linux
threat hunting · low
analyzing-powershell-empire-artifacts
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auditing-aws-s3-bucket-permissions
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cloud security · low
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cloud security · low
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red teaming · high
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threat hunting · low
detecting-misconfigured-azure-storage
cloud security · low
detecting-mobile-malware-behavior
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ot ics security · medium
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threat hunting · low
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detecting-serverless-function-injection
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threat hunting · low
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threat hunting · low
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threat hunting · low
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threat hunting · low
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api security · medium
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web application security · medium
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threat hunting · low
hunting-for-spearphishing-indicators
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threat hunting · low
hunting-for-supply-chain-compromise
threat hunting · low
hunting-for-suspicious-scheduled-tasks
threat hunting · low
hunting-for-t1098-account-manipulation
threat hunting · low
hunting-for-unusual-network-connections
threat hunting · low
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threat hunting · low
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phishing defense · medium
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devsecops · low
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vulnerability management · medium
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cloud security · low
implementing-code-signing-for-artifacts
devsecops · low
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ot ics security · medium
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ot ics security · medium
implementing-email-sandboxing-with-proofpoint
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devsecops · low
implementing-gcp-binary-authorization
cloud security · low
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cloud security · low
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cloud security · low
implementing-github-advanced-security-for-code-scanning
devsecops · low
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phishing defense · medium
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ot ics security · medium
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ot ics security · medium
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devsecops · low
implementing-mimecast-targeted-attack-protection
phishing defense · medium
implementing-mobile-application-management
mobile security · low
implementing-nerc-cip-compliance-controls
ot ics security · medium
implementing-network-segmentation-for-ot
ot ics security · medium
implementing-ot-incident-response-playbook
ot ics security · medium
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ot ics security · medium
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devsecops · low
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ot ics security · medium
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devsecops · low
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cloud security · low
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devsecops · low
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devsecops · low
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devsecops · low
intercepting-mobile-traffic-with-burpsuite
mobile security · low
managing-cloud-identity-with-okta
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red teaming · high
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red teaming · high
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phishing defense · medium
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api security · medium
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api security · medium
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web application security · medium
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ot ics security · medium
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red teaming · high
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penetration testing · medium
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ot ics security · medium
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reverse-engineering-ios-app-with-frida
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scanning-containers-with-trivy-in-cicd
devsecops · low
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cloud security · low
securing-azure-with-microsoft-defender
cloud security · low
securing-container-registry-images
cloud security · low
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devsecops · low
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ot ics security · medium
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cloud security · low
securing-remote-access-to-ot-environment
ot ics security · medium
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cloud security · low
testing-android-intents-for-vulnerabilities
mobile security · low
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api security · medium
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api security · medium
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api security · medium
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web application security · medium
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web application security · medium
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web application security · medium
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web application security · medium
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penetration testing · medium
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testing-for-xxe-injection-vulnerabilities
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testing-jwt-token-security
web application security · medium
testing-mobile-api-authentication
mobile security · low
testing-oauth2-implementation-flaws
api security · medium
testing-websocket-api-security
api security · medium
triaging-vulnerabilities-with-ssvc-framework
vulnerability management · medium
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