{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-86716","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","state":"PUBLISHED","assignerShortName":"VulDB","dateReserved":"2026-09-08T11:09:32.652Z","datePublished":"2026-09-08T18:45:05.842Z","dateUpdated":"2026-09-08T19:08:36.351Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","shortName":"VulDB","dateUpdated":"2026-09-08T18:45:05.842Z"},"title":"Cesanta mJS mjs_tok.c skip_spaces_and_comments heap-based overflow","problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-122","lang":"en","description":"Heap-based Buffer Overflow"}]},{"descriptions":[{"type":"CWE","cweId":"CWE-119","lang":"en","description":"Memory Corruption"}]}],"affected":[{"vendor":"Cesanta","product":"mJS","versions":[{"version":"1.0","status":"affected"},{"version":"1.1","status":"affected"},{"version":"1.2","status":"affected"},{"version":"1.3","status":"affected"},{"version":"1.4","status":"affected"},{"version":"1.5","status":"affected"},{"version":"1.6","status":"affected"},{"version":"1.7","status":"affected"},{"version":"1.8","status":"affected"},{"version":"1.9","status":"affected"},{"version":"1.10","status":"affected"},{"version":"1.11","status":"affected"},{"version":"1.12","status":"affected"},{"version":"1.13","status":"affected"},{"version":"1.14","status":"affected"},{"version":"1.15","status":"affected"},{"version":"1.16","status":"affected"},{"version":"1.17","status":"affected"},{"version":"1.18","status":"affected"},{"version":"1.19","status":"affected"},{"version":"1.20","status":"affected"},{"version":"1.21","status":"affected"},{"version":"1.22","status":"affected"},{"version":"1.23","status":"affected"},{"version":"1.24","status":"affected"},{"version":"1.25","status":"affected"},{"version":"1.26","status":"affected"}],"cpes":["cpe:2.3:a:cesanta:mjs:*:*:*:*:*:*:*:*"]}],"descriptions":[{"lang":"en","value":"A vulnerability was determined in Cesanta mJS up to 1.26. Affected is the function skip_spaces_and_comments of the file src/mjs_tok.c. Executing a manipulation can lead to heap-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet."}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":6.9,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":7.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","baseSeverity":"HIGH"}},{"cvssV3_0":{"version":"3.0","baseScore":7.3,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","baseSeverity":"HIGH"}},{"cvssV2_0":{"version":"2.0","baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR"}}],"timeline":[{"time":"2026-09-08T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-09-08T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-09-08T13:14:37.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"lrrh (VulDB User)","type":"reporter"},{"lang":"en","value":"VulDB CNA Team","type":"coordinator"}],"references":[{"url":"https://vuldb.com/vuln/399773","name":"VDB-399773 | Cesanta mJS mjs_tok.c skip_spaces_and_comments heap-based overflow","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/399773/cti","name":"VDB-399773 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/cve/CVE-2026-86716","name":"CVE-2026-86716 | CVE Analysis and Report","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/910881","name":"Submit #910881 | cesanta mJS v1.26 Heap-based Buffer Overflow","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/910882","name":"Submit #910882 | cesanta mJS v1.26 Heap-based Buffer Overflow (Duplicate)","tags":["third-party-advisory"]},{"url":"https://github.com/cesanta/mjs/issues/324","tags":["exploit","issue-tracking"]},{"url":"https://github.com/cesanta/mjs/","tags":["product"]}],"x_generator":["VulDB PVTS v202609"]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-08T19:07:17.867378Z","id":"CVE-2026-86716","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-08T19:08:36.351Z"}}]}}