CVE-2026-6878

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The vendor was contacted early about this disclosure but did not respond in any way."}, {"lang": "es", "value": "Una vulnerabilidad fue identificada en ByteDance verl hasta 0.7.0. Afectada es la funci\u00f3n math_equal del archivo prime_math/grader.py. La manipulaci\u00f3n conduce a un problema de sandbox. Es posible iniciar el ataque de forma remota. La complejidad de un ataque es bastante alta. Se dice que la explotabilidad es dif\u00edcil. El exploit est\u00e1 disponible p\u00fablicamente y podr\u00eda ser utilizado. El proveedor fue contactado tempranamente sobre esta divulgaci\u00f3n pero no respondi\u00f3 de ninguna manera."}], "id": "CVE-2026-6878", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "HIGH", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.1, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 4.9, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.4, "source": "cna@vuldb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.9, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "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": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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": "LOW", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-6878", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-23T12:48:50.323942Z", "version": "2.0.3"}}]}, "published": "2026-04-23T00:16:47.233", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/zast-ai/vulnerability-reports/blob/main/bytedance/verl_rce.md"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/795257"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/359040"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/359040/cti"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-264"}, {"lang": "en", "value": "CWE-265"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "0.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "0.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "0.3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "0.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "0.5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "0.6"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.7.0"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "verl", "vendor": "bytedance"}], "analysis": {"en": {"generated_at": "2026-04-28T20:37:11.159128+00:00", "value": {"mitigation_remediation": ["Upgrade ByteDance verl to a version newer than 0.7.0 when available", "Restrict the environment to run verl with minimal permissions and apply a hard\u2011coded sandbox to enforce least privilege", "Implement network access controls to limit exposure of the vulnerable API endpoint", "Monitor logs for anomalous calls to prime_math/grader.py"], "summary": {"action": "Apply Patch", "impact": "Potential sandbox escape"}, "threat_synthesis": {"affected_systems": "ByteDance verl versions up to 0.7.0 are affected; the vulnerability resides in the prime_math/grader.py module. Any deployment using a 0.7.0 or earlier release must evaluate the risk.", "description_and_impact": "In ByteDance verl, the math_equal function in prime_math/grader.py is vulnerable to a sandbox issue; the description indicates that remote attacks are possible. Based on the description, it is inferred that an attacker could potentially escape the sandbox and execute code beyond intended boundaries. This is a privilege escalation vulnerability (CWE\u2011264 and CWE\u2011265).", "risk_and_exploitability": "The CVSS score of 6.3 indicates medium severity. The EPSS score of less than 1% suggests a low likelihood of widespread exploitation. However, the existence of a publicly available exploit and the remote nature of the attack raise concerns. It is inferred that the presence of an exploit may lower the effective barrier for skilled adversaries."}}}}, "created": "2026-04-28T09:26:38.513017+00:00", "updated": "2026-04-28T20:45:16.598831+00:00", "vendors": ["bytedance", "bytedance$PRODUCT$verl"]}