{"id":"CVE-2026-23736","aliases":["EUVD-2026-3680","GHSA-hj76-42vx-jwp4","openSUSE-SU-2026:11673-1"],"status":"published","title":"seroval Affected by Prototype Pollution via JSON Deserialization","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00302,"percentile":0.23108,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321"],"published":"2026-01-21T15:41:14Z","modified":"2026-10-28T02:30:26Z","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"},{"fixed":"1.4.1"}]}]},{"source":"osv","ecosystem":"npm","package":"seroval","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.4.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"opencode","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.26-1.1"}]}],"bundled":3}],"products":[{"vendor":"lxsmnsyc","product":"seroval"}],"references":[{"url":"https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hj76-42vx-jwp4","tags":["x_refsource_CONFIRM","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-2026-23736","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-hj76-42vx-jwp4"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23736.json","tags":["advisory"]},{"url":"https://github.com/lxsmnsyc/seroval","tags":["package"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-23736","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-23737","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59940","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-23736","title":"seroval Affected by Prototype Pollution via JSON Deserialization","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.","status":"published","published":"2026-01-21T23:01:10.114Z","modified":"2026-01-22T14:45:53.95Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T13:42:15.603999Z"}],"euvd":[{"id":"EUVD-2026-3680","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.","status":"published","published":"2026-01-21T23:01:10Z","modified":"2026-01-22T14:45:53Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T19:48:48.974823Z"}],"ghsa":[{"id":"GHSA-hj76-42vx-jwp4","title":"seroval Affected by Prototype Pollution via JSON Deserialization","description":"Due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization.\nThis affects only JSON deserialization functionality.\n\nAs there is no known workaround, please upgrade to the latest version.","status":"published","published":"2026-01-21T15:41:14Z","modified":"2026-01-22T15:39:45Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:39:18.564331Z"}],"nvd":[{"id":"CVE-2026-23736","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.","status":"published","published":"2026-01-21T23:15:52.34Z","modified":"2026-06-17T10:22:01.23Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:12:04.423757Z"}],"osv":[{"id":"CVE-2026-23736","title":"seroval Affected by Prototype Pollution via JSON Deserialization","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.","status":"published","published":"2026-01-21T23:01:10.114Z","modified":"2026-10-28T02:30:26.490030404Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:44:59.079784Z"},{"id":"GHSA-hj76-42vx-jwp4","title":"seroval Affected by Prototype Pollution via JSON Deserialization","description":"Due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization.\nThis affects only JSON deserialization functionality.\n\nAs there is no known workaround, please upgrade to the latest version.","status":"published","published":"2026-01-21T15:41:14Z","modified":"2026-02-03T03:10:36.39396Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:49.28217Z"},{"id":"openSUSE-SU-2026:11673-1","title":"opencode-1.18.26-1.1 on GA media","description":"These are all security issues fixed in the opencode-1.18.26-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-09-02T00:00:00Z","modified":"2026-09-03T10:00:09.816259691Z","updated_at":"2026-11-02T16:58:39.516824Z"}]}}