CVE-2026-3387

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{"affected": [{"affectedData": [{"product": "wren", "vendor": "wren-lang", "versions": [{"status": "affected", "version": "0.1"}, {"status": "affected", "version": "0.2"}, {"status": "affected", "version": "0.3"}, {"status": "affected", "version": "0.4.0"}]}], "source": "cna@vuldb.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:wren:wren:*:*:*:*:*:*:*:*", "matchCriteriaId": "5B3A76EF-D824-491F-B1BF-07C619DE6D6D", "versionEndIncluding": "0.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been found in wren-lang wren up to 0.4.0. Affected by this issue is the function getByteCountForArguments of the file src/vm/wren_compiler.c. Such manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet."}, {"lang": "es", "value": "Se ha encontrado una vulnerabilidad en wren-lang wren hasta 0.4.0, la cual afeacta a la funci\u00f3n getByteCountForArguments del archivo src/vm/wren_compiler.c. Su manipulaci\u00f3n lleva a una desreferencia de puntero nulo. Se requiere acceso local para abordar este ataque. El exploit ha sido divulgado al p\u00fablico 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-2026-3387", "lastModified": "2026-06-17T10:43:30.660", "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": 5.5, "baseSeverity": "MEDIUM", "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:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "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-2026-3387", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-02T19:35:02.890254Z", "version": "2.0.3"}}]}, "published": "2026-03-01T10:16:00.863", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit"], "url": "https://github.com/oneafter/0122/blob/main/i1220/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/1220"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.348273"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.348273"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.761312"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-404"}, {"lang": "en", "value": "CWE-476"}], "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": "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": "2026-04-17T13:47:05.464131+00:00", "value": {"mitigation_remediation": ["Upgrade to the latest release of wren once the security fix is available; this removes the vulnerable code path.", "If upgrading is not immediately possible, isolate or sandbox any applications that rely on wren so that local users cannot supply arbitrary scripts and restrict write permissions to the compiler source to prevent tampering.", "Keep an eye on the official wren project\u2019s issue tracker and mailing lists for updates; if a patch or rollback is released, apply it promptly."], "summary": {"action": "Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The issue applies to the wren programming language maintained by wren-lang, with affected releases up to and including version 0.4.0. Any systems that embed or run wren scripts built with these versions are potentially vulnerable.", "description_and_impact": "The reported flaw is a null pointer dereference in the getByteCountForArguments function of wren\u2019s compiler, which can cause the interpreter to crash or terminate unexpectedly. Because the error occurs during argument handling, a malformed script or data supplied locally can trigger this failure, resulting in a denial of service for any process running wren. The vulnerability is classified as a local fault; it does not provide the attacker with code execution or privilege escalation capabilities.", "risk_and_exploitability": "The CVSS score of 4.8 indicates a moderate risk, and the EPSS score of less than 1\u202f% shows that, at the time of analysis, the probability of exploitation observed in the wild is very low. The vulnerability is only exploitable by someone with local access to the environment running wren; it is not remotely reachable, and the vulnerability is not listed in CISA\u2019s Known Exploited Vulnerabilities catalog. Because the exploit has been disclosed publicly, users must monitor for a patch and limit local privileges until a fix is applied. The likely attack vector is local; an attacker would need to supply crafted input to the interpreter."}}}}, "created": "2026-03-02T12:04:07.248925+00:00", "updated": "2026-04-17T14:00:15.795113+00:00", "vendors": ["wren-lang", "wren-lang$PRODUCT$wren"]}