CVE-2026-40157

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{"affected": [{"affectedData": [{"product": "PraisonAI", "vendor": "MervinPraison", "versions": [{"status": "affected", "version": "< 4.5.128"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:*", "matchCriteriaId": "56CDE5F5-B03C-4C3A-9A92-F61C9DFDA9B1", "versionEndExcluding": "4.5.128", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "PraisonAI is a multi-agent teams system. Prior to 4.5.128, cmd_unpack in the recipe CLI extracts .praison tar archives using raw tar.extract() without validating archive member paths. A .praison bundle containing ../../ entries will write files outside the intended output directory. An attacker who distributes a malicious bundle can overwrite arbitrary files on the victim's filesystem when they run praisonai recipe unpack. This vulnerability is fixed in 4.5.128."}, {"lang": "es", "value": "PraisonAI es un sistema de equipos multiagente. Antes de la versi\u00f3n 4.5.128, cmd_unpack en la CLI de recetas extrae archivos tar .praison utilizando tar.extract() directamente sin validar las rutas de los miembros del archivo. Un paquete .praison que contiene entradas .. / .. / escribir\u00e1 archivos fuera del directorio de salida previsto. Un atacante que distribuye un paquete malicioso puede sobrescribir archivos arbitrarios en el sistema de archivos de la v\u00edctima cuando ejecutan praisonai recipe unpack. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 4.5.128."}], "id": "CVE-2026-40157", "lastModified": "2026-10-26T00:10:00.150", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.4, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40157", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-14T14:13:25.449221Z", "version": "2.0.3"}}]}, "published": "2026-04-10T17:17:13.457", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-99g3-w8gr-x37c"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-99g3-w8gr-x37c"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.5.128)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "PraisonAI", "source": "cna", "vendor": "MervinPraison"}, "product": "praisonai", "vendor": "mervinpraison"}], "analysis": {"en": {"generated_at": "2026-04-10T18:22:56.489703+00:00", "value": {"mitigation_remediation": ["Upgrade PryasonAI to version 4.5.128 or later", "If upgrading is not immediately possible, restrict the execution of \"praisonai recipe unpack\" to trusted, signed bundles only", "Audit file permissions in destinations used by the recipe unpack command to limit write access", "Apply additional security controls such as file integrity monitoring for critical system files"], "summary": {"action": "Apply patch", "impact": "Arbitrary file write (possible system compromise)"}, "threat_synthesis": {"affected_systems": "The affected product is MervinPraison PryasonAI. All releases prior to 4.5.128 are vulnerable. No specific sub\u2011components are listed, but any instance that invokes the recipe unpack command is at risk.", "description_and_impact": "The vulnerability arises in the recipe CLI command that extracts .praison tar archives. Before version 4.5.128, the extraction logic calls tar.extract() without sanitizing the archive member paths. If an archive contains entries with \"../../\" components, the extraction process will write files outside the intended output directory. This allows an attacker who can supply a malicious bundle to overwrite arbitrary files on the victim\u2019s filesystem. The weakness is a classic path traversal (CWE\u201122). The primary impact is the ability to replace critical configuration files or binaries, which can lead to privilege escalation or denial of service.", "risk_and_exploitability": "The CVSS base score is 9.4, indicating a high severity flaw. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog. It is inferred that the attack vector requires the victim to run the \"praisonai recipe unpack\" command against a crafted .praison bundle. An attacker can deliver a malicious bundle and await its execution by a user or automated process. Once executed, the attack can overwrite any file the running user has write access to, creating a pathway for further compromise. The lack of a publicly demonstrated exploit and the absence of EPSS data suggest moderate exploitation likelihood, but the high CVSS score and wide potential impact keep overall risk elevated."}}}}, "created": "2026-04-13T12:43:50.253936+00:00", "updated": "2026-04-13T13:00:17.715610+00:00", "vendors": ["mervinpraison", "mervinpraison$PRODUCT$praisonai"]}