{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-44966", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-08T16:23:33.263Z", "datePublished": "2026-05-26T21:21:29.986Z", "dateUpdated": "2026-05-26T21:21:29.986Z"}, "containers": {"cna": {"title": "Velocity.js: Prototype Pollution in #set path assignment", "problemTypes": [{"descriptions": [{"cweId": "CWE-1321", "lang": "en", "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/shepherdwind/velocity.js/security/advisories/GHSA-j658-c2gf-x6pq", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/shepherdwind/velocity.js/security/advisories/GHSA-j658-c2gf-x6pq"}], "affected": [{"vendor": "shepherdwind", "product": "velocity.js", "versions": [{"version": "<= 2.1.5", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-26T21:21:29.986Z"}, "descriptions": [{"lang": "en", "value": "Velocity.js is a JavaScript implementation of the Apache Velocity template engine. In 2.1.5 and earlier, a prototype pollution vulnerability was discovered in velocityjs. This issue occurs during the processing of #set directives in Velocity templates. If an application renders a template controlled by an attacker, it is possible to modify Object.prototype, potentially leading to Denial of Service (DoS) or Remote Code Execution (RCE) depending on the server environment."}], "source": {"advisory": "GHSA-j658-c2gf-x6pq", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Velocity.js is a JavaScript implementation of the Apache Velocity template engine. In 2.1.5 and earlier, a prototype pollution vulnerability was discovered in velocityjs. This issue occurs during the processing of #set directives in Velocity templates. If an application renders a template controlled by an attacker, it is possible to modify Object.prototype, potentially leading to Denial of Service (DoS) or Remote Code Execution (RCE) depending on the server environment."}], "id": "CVE-2026-44966", "lastModified": "2026-05-26T22:16:43.293", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-26T22:16:43.293", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/shepherdwind/velocity.js/security/advisories/GHSA-j658-c2gf-x6pq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1321"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.1.5]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "velocity.js", "source": "cna", "vendor": "shepherdwind"}, "product": "velocity.js", "vendor": "shepherdwind"}], "created": "2026-05-26T22:30:18.408507+00:00", "updated": "2026-05-27T10:08:19.326907+00:00", "vendors": ["shepherdwind", "shepherdwind$PRODUCT$velocity.js"]}