{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-25521", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-02-02T18:21:42.487Z", "datePublished": "2026-02-04T21:20:32.643Z", "dateUpdated": "2026-07-15T02:49:16.910Z" }, "containers": { "cna": { "title": "Locutus is vulnerable to Prototype Pollution", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-1321", "lang": "en", "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')", "type": "CWE" } ] } ], "metrics": [ { "cvssV4_0": { "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "baseScore": 9.4, "baseSeverity": "CRITICAL", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "version": "4.0" } } ], "references": [ { "name": "https://github.com/locutusjs/locutus/security/advisories/GHSA-rxrv-835q-v5mh", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/locutusjs/locutus/security/advisories/GHSA-rxrv-835q-v5mh" }, { "name": "https://github.com/locutusjs/locutus/commit/042af9ca7fde2ff599120783e720a17f335bb01c", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/locutusjs/locutus/commit/042af9ca7fde2ff599120783e720a17f335bb01c" } ], "affected": [ { "vendor": "locutusjs", "product": "locutus", "versions": [ { "version": ">= 2.0.12, < 2.0.39", "status": "affected" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-02-04T21:20:32.643Z" }, "descriptions": [ { "lang": "en", "value": "Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. In versions from 2.0.12 to before 2.0.39, a prototype pollution vulnerability exists in locutus. Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using String.prototype. This issue has been patched in version 2.0.39." } ], "source": { "advisory": "GHSA-rxrv-835q-v5mh", "discovery": "UNKNOWN" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-02-05T14:23:07.184247Z", "id": "CVE-2026-25521", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-05T14:31:43.203Z" } }, { "affected": [ { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:logging:5" ], "defaultStatus": "unaffected", "packageName": "openshift-logging/elasticsearch6-rhel9", "product": "Logging Subsystem for Red Hat OpenShift", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:logging:5" ], "defaultStatus": "unaffected", "packageName": "openshift-logging/elasticsearch-operator-bundle", "product": "Logging Subsystem for Red Hat OpenShift", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:logging:5" ], "defaultStatus": "unaffected", "packageName": "openshift-logging/elasticsearch-proxy-rhel9", "product": "Logging Subsystem for Red Hat OpenShift", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:logging:5" ], "defaultStatus": "unaffected", "packageName": "openshift-logging/elasticsearch-rhel9-operator", "product": "Logging Subsystem for Red Hat OpenShift", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:logging:5" ], "defaultStatus": "unaffected", "packageName": "openshift-logging/kibana6-rhel8", "product": "Logging Subsystem for Red Hat OpenShift", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:logging:5" ], "defaultStatus": "unaffected", "packageName": "openshift-logging/logging-curator5-rhel9", "product": "Logging Subsystem for Red Hat OpenShift", "vendor": "Red Hat" } ], "datePublic": "2026-02-04T21:20:32.643Z", "descriptions": [ { "lang": "en", "value": "A prototype pollution flaw has been discovered in the Locutus npm library. Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using String.prototype." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Critical" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-915", "description": "Improperly Controlled Modification of Dynamically-Determined Object Attributes", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-25521" }, { "name": "RHBZ#2436950", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436950" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25521.json" } ], "timeline": [ { "lang": "en", "time": "2026-02-04T22:01:35.989Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-02-04T21:20:32.643Z", "value": "Made public." } ], "title": "locutus: Locutus is vulnerable to Prototype Pollution", "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-07-15T02:49:16.910Z" } } ] } }