CVE-2026-3386

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The project was informed of the problem early through an issue report but has not responded yet."}, {"lang": "es", "value": "Se ha encontrado una falla en wren-lang wren hasta 0.4.0, la cual afeacta a la funci\u00f3n emitOp del archivo src/vm/wren_compiler.c. Su manipulaci\u00f3n causa lectura fuera de l\u00edmites. Es posible lanzar el ataque en el host local. El exploit ha sido publicado y puede ser usado. Se inform\u00f3 con antelaci\u00f3n del problema al proyecto, a trav\u00e9s de un informe de incidencias, pero a\u00fan no ha respondido."}], "id": "CVE-2026-3386", "lastModified": "2026-06-17T10:43:30.527", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 1.7, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 3.1, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 3.3, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 1.9, "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3386", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-02T19:34:34.781647Z", "version": "2.0.3"}}]}, "published": "2026-03-01T09:15:58.147", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit"], "url": "https://github.com/oneafter/0122/blob/main/i1219/repro"}, {"source": "cna@vuldb.com", "tags": ["Product"], "url": "https://github.com/wren-lang/wren/"}, {"source": "cna@vuldb.com", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://github.com/wren-lang/wren/issues/1219"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.348272"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.348272"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.761306"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-125"}], "source": "cna@vuldb.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"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": "semver", "value": "0.4.0"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "wren", "source": "cna", "vendor": "wren-lang"}, "product": "wren", "vendor": "wren-lang"}], "analysis": {"en": {"generated_at": "2026-04-16T14:59:32.826756+00:00", "value": {"mitigation_remediation": ["Upgrade Wren to a version that patches the emitOp bounds check (for example, a release newer than 0.4.0).", "Until a patch lands, isolate the compilation environment by restricting file and network access for the compiler process and limiting execution privileges. ", "Monitor the system for irregular memory accesses or suspicious compiler execution patterns, and consider disabling Wren compilation features if they are not required."], "summary": {"action": "Upgrade", "impact": "Memory Disclosure"}, "threat_synthesis": {"affected_systems": "The issue affects the Wren language compiler supplied by wren-lang and applies to all releases up to version 0.4.0; the problem resides in src/vm/wren_compiler.c and has been reported against the official GitHub repository.", "description_and_impact": "The vulnerability is an out-of-bounds read in the emitOp function of the Wren compiler, which can expose internal memory contents and potentially allow local attackers to read unintended data, a classic buffer access flaw (CWE-119/CWE-125).", "risk_and_exploitability": "The CVSS score of 4.8 indicates moderate risk while the EPSS score of under 1% reflects a very low exploitation probability; the vulnerability is not listed in the CISA KEV catalog and can only be leveraged from the local host, with a published exploit available in the public domain."}}}}, "created": "2026-03-02T12:04:08.048382+00:00", "updated": "2026-04-16T15:00:14.327058+00:00", "vendors": ["wren-lang", "wren-lang$PRODUCT$wren"]}