CVE-2026-34955

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{"affected": [{"affectedData": [{"product": "PraisonAI", "vendor": "MervinPraison", "versions": [{"status": "affected", "version": "< 4.5.97"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:*", "matchCriteriaId": "7525B4ED-CECC-4805-8EED-C055561A15F0", "versionEndExcluding": "4.5.97", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "PraisonAI is a multi-agent teams system. Prior to version 4.5.97, SubprocessSandbox in all modes (BASIC, STRICT, NETWORK_ISOLATED) calls subprocess.run() with shell=True and relies solely on string-pattern matching to block dangerous commands. The blocklist does not include sh or bash as standalone executables, allowing trivial sandbox escape in STRICT mode via sh -c '<command>'. This issue has been patched in version 4.5.97."}, {"lang": "es", "value": "PraisonAI es un sistema de equipos multiagente. Antes de la versi\u00f3n 4.5.97, SubprocessSandbox en todos los modos (BASIC, STRICT, NETWORK_ISOLATED) llama a subprocess.run() con shell=True y se basa \u00fanicamente en la coincidencia de patrones de cadena para bloquear comandos peligrosos. La lista de bloqueo no incluye sh o bash como ejecutables independientes, lo que permite un escape trivial de la sandbox en modo STRICT a trav\u00e9s de sh -c '<command>'. Este problema ha sido parcheado en la versi\u00f3n 4.5.97."}], "id": "CVE-2026-34955", "lastModified": "2026-07-24T21:10:00.143", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34955", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-06T19:06:05.667759Z", "version": "2.0.3"}}]}, "published": "2026-04-04T00:16:19.370", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-r4f2-3m54-pp7q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.5.97)"}}], "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": "2026-04-14T21:54:50.434807+00:00", "value": {"mitigation_remediation": ["Upgrade PraisonAI to version 4.5.97 or newer.", "If unable to upgrade, disable the use of shell=True in SubprocessSandbox.", "Ensure sh and bash are excluded from any custom blocklists and monitor subprocess activity for suspicious commands."], "summary": {"action": "Patch", "impact": "Remote code execution via sandbox escape"}, "threat_synthesis": {"affected_systems": "The flaw exists in PraisonAI from MervinPraison. All releases older than version 4.5.97 are vulnerable; the issue is fixed in version 4.5.97 and later.", "description_and_impact": "The SubprocessSandbox component uses subprocess.run(..., shell=True) and relies on a string\u2011pattern blocklist that excludes sh or bash when invoked as standalone executables. This omission allows an attacker to execute arbitrary host commands such as sh -c '<command>' in STRICT mode. Based on the description, it is inferred that this capability permits the attacker to run any command on the host, potentially compromising confidentiality, integrity, and availability.", "risk_and_exploitability": "The CVSS score of 8.8 indicates a high severity, while an EPSS score of less than 1\u202f% implies that exploitation is currently unlikely on a broad scale. The vulnerability is identified as CWE\u201178 (OS Command Injection). The likely attack vector is via an attacker supplying a malicious command string to the sandbox\u2019s subprocess call; this inference comes from the description that the escape can be achieved with sh -c '<command>'. Therefore, the risk is significant if the attacker can influence the sandbox input or has local access to the environment."}}}}, "created": "2026-04-06T21:21:45.713158+00:00", "updated": "2026-04-15T16:30:09.762037+00:00", "vendors": ["mervinpraison", "mervinpraison$PRODUCT$praisonai"]}