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The vulnerability is derived from prototype pollution exploitation.\rExploiting this vulnerability might result in remote code execution (\"RCE\").\r\r**Vulnerable functions:**\r\r__defineGetter__, stack(), toLocaleString(), propertyIsEnumerable.call(), 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vulnerable to Prototype Pollution via the safeEval function\nAll versions of the package safe-eval is vulnerable to Prototype Pollution via the safeEval function, due to improper sanitization of its parameter content.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-26121","reference_id":"","reference_type":"","scores":[{"value":"0.00349","scoring_system":"epss","scoring_elements":"0.57658","published_at":"2026-06-04T12:55:00Z"},{"value":"0.00349","scoring_system":"epss","scoring_elements":"0.57714","published_at":"2026-06-09T12:55:00Z"},{"value":"0.00349","scoring_system":"epss","scoring_elements":"0.57696","published_at":"2026-06-08T12:55:00Z"},{"value":"0.00349","scoring_system":"epss","scoring_elements":"0.57709","published_at":"2026-06-07T12:55:00Z"},{"value":"0.00349","scoring_system":"epss","scoring_elements":"0.57718","published_at":"2026-06-06T12:55:00Z"},{"value":"0.00349","scoring_system":"epss","scoring_elements":"0.5771","published_at":"2026-06-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-26121"},{"reference_url":"https://gist.github.com/seongil-wi/9d9fc0cc5b7b130419cd45827e59c4f9","reference_id":"","reference_type":"","scores":[{"value":"10.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-02-10T15:16:22Z/"}],"url":"https://gist.github.com/seongil-wi/9d9fc0cc5b7b130419cd45827e59c4f9"},{"reference_url":"https://github.com/hacksparrow/safe-eval","reference_id":"","reference_type":"","scores":[{"value":"10.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/hacksparrow/safe-eval"},{"reference_url":"https://github.com/hacksparrow/safe-eval/issues/28","reference_id":"","reference_type":"","scores":[{"value":"10.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-02-10T15:16:22Z/"}],"url":"https://github.com/hacksparrow/safe-eval/issues/28"},{"reference_url":"https://security.snyk.io/vuln/SNYK-JS-SAFEEVAL-3373062","reference_id":"","reference_type":"","scores":[{"value":"10.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-02-10T15:16:22Z/"}],"url":"https://security.snyk.io/vuln/SNYK-JS-SAFEEVAL-3373062"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26121","reference_id":"CVE-2023-26121","reference_type":"","scores":[{"value":"10.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26121"},{"reference_url":"https://github.com/advisories/GHSA-hcg3-56jf-x4vh","reference_id":"GHSA-hcg3-56jf-x4vh","reference_type":"","scores":[{"value":"CRITICAL","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-hcg3-56jf-x4vh"}],"fixed_packages":[],"aliases":["CVE-2023-26121","GHSA-hcg3-56jf-x4vh"],"risk_score":4.5,"exploitability":"0.5","weighted_severity":"9.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-jfqz-zcs9-2yby"}],"fixing_vulnerabilities":[],"risk_score":"4.5","resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/safe-eval@0.4.2"}