{"id":"CVE-2026-104846","summary":"Seroval: `fromJSON()` Promise thenable assimilation invokes plugin-produced callables (bypass of CVE-2026-59940)","details":"Seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. From 0.12.0 until 1.6.2, fromJSON deserialization of a fulfilled Promise control node can pass a plugin-produced callable-bearing thenable to a native Promise resolver. ECMAScript thenable assimilation then invokes the callable unexpectedly, allowing attacker-controlled JSON to trigger code in applications using plugin-capable Seroval releases. This path bypasses the Promise resolver type-confusion remediation in version 1.5.3 for CVE-2026-59940 because the unexpected invocation occurs through native Promise settlement after the referenced value is deserialized. This issue is fixed in version 1.6.2.","aliases":["GHSA-p6vx-979v-rg4c"],"modified":"2026-10-04T02:46:37.642974183Z","published":"2026-10-02T15:59:45.802Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104846.json","unresolved_ranges":[{"extracted_events":[{"introduced":"0.12.0"},{"fixed":"1.6.2"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"GitHub_M","cwe_ids":["CWE-843"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104846.json"},{"type":"ADVISORY","url":"https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-p6vx-979v-rg4c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104846"},{"type":"FIX","url":"https://github.com/lxsmnsyc/seroval/commit/f1ffcc96d259f9b5b3d71feb262b58240c90e7b7"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/lxsmnsyc/seroval","events":[{"introduced":"0"},{"fixed":"f1ffcc96d259f9b5b3d71feb262b58240c90e7b7"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v1.5.5","1.5.0","1.4.2","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.1","v1.2.0","v1.1.1","v1.1.0","v1.0.8","v1.0.7","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.15.1","v0.15.0","v0.14.1","v0.14.0","v0.13.2","v0.13.1","v0.13.0","v0.12.4","v0.12.3","v0.12.2","v0.12.1","v0.12.0","v0.11.6","v0.11.5","v0.11.4","v0.11.3","v0.11.2","v0.11.1","v0.11.0","v0.10.4","v0.10.3","v0.10.2","v0.10.1","v0.10.0","v0.9.0","v0.8.0","v0.7.0","v0.6.0","v0.5.1","v0.5.0","v0.4.1","v0.4.0","v0.3.0","v0.2.1","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104846.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}