CVE-2026-23940

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This can terminate the affected application instance and result in a denial of service for package publishing and potentially other package-processing functionality.</p>\n<p>This issue affects hex.pm: before 2026-03-10.</p>"}, {"base64": false, "type": "text/markdown", "value": "Uncontrolled Resource Consumption vulnerability in hexpm hexpm/hexpm allows Excessive Allocation.\n\nPublishing an oversized package can cause Hex.pm to run out of memory while extracting the uploaded package tarball. This can terminate the affected application instance and result in a denial of service for package publishing and potentially other package-processing functionality.\n\nThis issue affects hex.pm: before 2026-03-10."}], "value": "Uncontrolled Resource Consumption vulnerability in hexpm hexpm/hexpm allows Excessive Allocation.\n\nPublishing an oversized package can cause Hex.pm to run out of memory while extracting the uploaded package tarball. This can terminate the affected application instance and result in a denial of service for package publishing and potentially other package-processing functionality.\n\nThis issue affects hex.pm: before 2026-03-10."}], "impacts": [{"capecId": "CAPEC-130", "descriptions": [{"lang": "en", "value": "CAPEC-130 Excessive Allocation"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 7.1, "baseSeverity": "HIGH", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "description": "CWE-400 Uncontrolled Resource Consumption", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-09-08T13:32:42.745Z"}, "references": [{"tags": ["vendor-advisory", "related"], "url": "https://github.com/hexpm/hexpm/security/advisories/GHSA-jp8w-gxf6-8hcr"}, {"name": "EEF CNA record for CVE-2026-23940", "tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-23940.html"}, {"name": "OSV record EEF-CVE-2026-23940", "tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-23940"}, {"name": "Introducing commit 82911da in hexpm/hexpm", "tags": ["related"], "url": "https://github.com/hexpm/hexpm/commit/82911daf5f8fb2ab44f298e3ba22b90bc1ae3746"}, {"name": "Fix commit 495f016 in hexpm/hexpm", "tags": ["patch"], "url": "https://github.com/hexpm/hexpm/commit/495f01607d3eae4aed7ad09b2f54f31ec7a7df01"}], "source": {"discovery": "EXTERNAL"}, "title": "Denial of Service via Oversized Package Upload", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<ul>\n<li>Prevent large package uploads by enforcing upload size limits at the reverse proxy or load balancer level.</li>\n</ul>"}, {"base64": false, "type": "text/markdown", "value": "* Prevent large package uploads by enforcing upload size limits at the reverse proxy or load balancer level."}], "value": "* Prevent large package uploads by enforcing upload size limits at the reverse proxy or load balancer level."}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-16T17:06:18.779960Z", "id": "CVE-2026-23940", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-16T17:06:25.539Z"}}]}}

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{"affected": [{"affectedData": [{"collectionURL": "https://hex.pm", "cpes": ["cpe:2.3:a:hexpm:hexpm:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "packageName": "hex.pm", "product": "hexpm", "vendor": "hexpm", "versions": [{"lessThan": "2026-03-10", "status": "affected", "version": "0", "versionType": "date"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:hexpm:hexpm:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "packageName": "hexpm/hexpm", "packageURL": "pkg:github/hexpm/hexpm", "product": "hexpm", "repo": "https://github.com/hexpm/hexpm", "vendor": "hexpm", "versions": [{"lessThan": "495f01607d3eae4aed7ad09b2f54f31ec7a7df01", "status": "affected", "version": "82911daf5f8fb2ab44f298e3ba22b90bc1ae3746", "versionType": "git"}]}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:hex:hexpm:*:*:*:*:*:*:*:*", "matchCriteriaId": "BD8E3FFD-F93D-40D5-9C75-F87995F3A7AF", "versionEndExcluding": "2026-03-09", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Uncontrolled Resource Consumption vulnerability in hexpm hexpm/hexpm allows Excessive Allocation.\n\nPublishing an oversized package can cause Hex.pm to run out of memory while extracting the uploaded package tarball. This can terminate the affected application instance and result in a denial of service for package publishing and potentially other package-processing functionality.\n\nThis issue affects hex.pm: before 2026-03-10."}, {"lang": "es", "value": "Una vulnerabilidad de consumo de recursos no controlado en hexpm hexpm/hexpm permite una asignaci\u00f3n excesiva. Publicar un paquete sobredimensionado puede hacer que Hex.pm se quede sin memoria mientras extrae el tarball del paquete subido. Esto puede terminar la instancia de aplicaci\u00f3n afectada y resultar en una denegaci\u00f3n de servicio para la publicaci\u00f3n de paquetes y potencialmente otras funcionalidades de procesamiento de paquetes.\n\nEste problema afecta a hexpm: antes de 495f01607d3eae4aed7ad09b2f54f31ec7a7df01; hex.pm: antes del 2026-03-10."}], "id": "CVE-2026-23940", "lastModified": "2026-09-08T14:17:21.340", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "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": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23940", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-16T17:06:18.779960Z", "version": "2.0.3"}}]}, "published": "2026-03-13T19:54:14.640", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-23940.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Patch"], "url": "https://github.com/hexpm/hexpm/commit/495f01607d3eae4aed7ad09b2f54f31ec7a7df01"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/hexpm/hexpm/commit/82911daf5f8fb2ab44f298e3ba22b90bc1ae3746"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/hexpm/hexpm/security/advisories/GHSA-jp8w-gxf6-8hcr"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-23940"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}

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