{"id":"CVE-2026-88389","title":"Espruino 2v29 (commit bffc6d0) contains a NULL pointer dereference vulnerability in jslGetRawString() in src/jslex.c","summary":"Espruino 2v29 (commit bffc6d0) contains a NULL pointer dereference vulnerability in jslGetRawString() in src/jslex.c. Crafted raw/binary string input can cause the lexer to pass a NULL iterator target to jsvLockAgain(). In RELEASE/NO_ASS…","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"published":"2026-09-25","updated":"2026-09-30","sourceUpdated":"2026-09-30T17:32:07.107","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88389","references":[{"url":"https://github.com/espruino/Espruino/commit/0db0663ac5201a6fea68094b45da673edec45187","label":"cve@mitre.org"},{"url":"https://github.com/espruino/Espruino/issues/2745","label":"cve@mitre.org"},{"url":"https://github.com/espruino/Espruino/issues/2745","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00161,"epssPercentile":0.05256,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-29T03:18:57.521290Z"},"ingestedAt":"2026-09-25T15:10:56.370Z","slug":"CVE-2026-88389","body":"## Overview\n\nEspruino 2v29 (commit bffc6d0) contains a NULL pointer dereference vulnerability in jslGetRawString() in src/jslex.c. Crafted raw/binary string input can cause the lexer to pass a NULL iterator target to jsvLockAgain(). In RELEASE/NO_ASSERT builds, the missing assertion guard allows a write through the NULL pointer, resulting in memory corruption and application termination or denial of service.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":34.1,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":212256,"id":"CVE-2026-88389","ts":1790656073252,"field":"exploit_available","old":"false","new":"true"},{"seq":212255,"id":"CVE-2026-88389","ts":1790656073252,"field":"cvss","old":null,"new":"6.2"},{"seq":212254,"id":"CVE-2026-88389","ts":1790656073252,"field":"severity","old":"none","new":"medium"}]}