{"id":"CVE-2026-23957","aliases":["EUVD-2026-3668","GHSA-66fc-rw6m-c2q6"],"status":"published","title":"seroval is vulnerable to Denial of Service via array serialization","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0\nand below, overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to significantly increase processing time. This issue has been fixed in version 1.4.1.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00439,"percentile":0.38387,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2026-01-21T17:05:54Z","modified":"2026-10-28T02:30:23Z","fixes":[{"ecosystem":"npm","package":"seroval","fixed_in":["1.4.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"seroval","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.4.0"},{"fixed":"1.4.1"}]}]},{"source":"osv","ecosystem":"npm","package":"seroval","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.4.1"}]}]}],"products":[{"vendor":"lxsmnsyc","product":"seroval"}],"references":[{"url":"https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-66fc-rw6m-c2q6","tags":["x_refsource_CONFIRM","Mitigation","Vendor Advisory","advisory","web"]},{"url":"https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23957","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-66fc-rw6m-c2q6"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23957.json","tags":["advisory"]},{"url":"https://github.com/lxsmnsyc/seroval","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-23957","title":"seroval is vulnerable to Denial of Service via array serialization","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0\nand below, overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to significantly increase processing time. This issue has been fixed in version 1.4.1.","status":"published","published":"2026-01-22T01:26:53.869Z","modified":"2026-01-22T18:56:49.004Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T13:42:04.39372Z"}],"euvd":[{"id":"EUVD-2026-3668","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0\nand below, overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to significantly increase processing time. This issue has been fixed in version 1.4.1.","status":"published","published":"2026-01-22T01:26:53Z","modified":"2026-01-22T18:56:49Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T19:48:48.575559Z"}],"ghsa":[{"id":"GHSA-66fc-rw6m-c2q6","title":"Seroval affected by Denial of Service via Array serialization","description":"Overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to **significantly increase processing time**.  \n\n**Mitigation**:  \n`Seroval` no longer encodes array lengths.\nInstead, it computes length using `Array.prototype.length` during deserialization.","status":"published","published":"2026-01-21T17:05:54Z","modified":"2026-01-22T15:44:02Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:39:19.525691Z"}],"nvd":[{"id":"CVE-2026-23957","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0\nand below, overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to significantly increase processing time. This issue has been fixed in version 1.4.1.","status":"published","published":"2026-01-22T02:15:52.47Z","modified":"2026-06-17T10:22:21.077Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:04.423757Z"}],"osv":[{"id":"CVE-2026-23957","title":"seroval is vulnerable to Denial of Service via array serialization","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0\nand below, overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to significantly increase processing time. This issue has been fixed in version 1.4.1.","status":"published","published":"2026-01-22T01:26:53.869Z","modified":"2026-10-28T02:30:23.876471448Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:44:59.079784Z"},{"id":"GHSA-66fc-rw6m-c2q6","title":"Seroval affected by Denial of Service via Array serialization","description":"Overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to **significantly increase processing time**.  \n\n**Mitigation**:  \n`Seroval` no longer encodes array lengths.\nInstead, it computes length using `Array.prototype.length` during deserialization.","status":"published","published":"2026-01-21T17:05:54Z","modified":"2026-02-03T03:10:03.317259Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:46:39.266402Z"}]}}