{"id":"CVE-2026-88388","title":"Espruino 2v29 (commit bffc6d0) contains a stack-based buffer overflow vulnerability in the JavaScript error stack-trace handling path on 64-bit builds","summary":"Espruino 2v29 (commit bffc6d0) contains a stack-based buffer overflow vulnerability in the JavaScript error stack-trace handling path on 64-bit builds. A remote attacker can supply JavaScript input that triggers an exception and reaches …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-121"],"published":"2026-09-24","updated":"2026-09-25","sourceUpdated":"2026-09-25T16:17:29.213","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88388","references":[{"url":"https://github.com/espruino/Espruino/commit/ecd7d43e084ba9aafa8245609347fe0f4383b38c","label":"cve@mitre.org"}],"tags":["nvd","cve.org"],"epss":0.00318,"epssPercentile":0.24618,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-25T15:14:04.581717Z"},"ingestedAt":"2026-09-24T20:51:40.267Z","slug":"CVE-2026-88388","body":"## Overview\n\nEspruino 2v29 (commit bffc6d0) contains a stack-based buffer overflow vulnerability in the JavaScript error stack-trace handling path on 64-bit builds. A remote attacker can supply JavaScript input that triggers an exception and reaches jslPrintTokenLineMarker(), which passes the address of a 4-byte int column variable to jsvGetLineAndCol() as a size_t pointer. jsvGetLineAndCol() performs an 8-byte write through the mismatched pointer, overwriting adjacent stack memory.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":211053,"id":"CVE-2026-88388","ts":1790352787952,"field":"cvss","old":null,"new":"7.5"},{"seq":211052,"id":"CVE-2026-88388","ts":1790352787952,"field":"severity","old":"none","new":"high"}]}