{"schema_version":1,"title":"Cesanta vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 10 vulnerabilities in Cesanta: 0 in the last 7 days and 10 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-86716, was published on 8 September 2026.","url":"https://junglewise.ai/threats/vendors/cesanta","json_url":"https://junglewise.ai/threats/vendors/cesanta.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/vendors/cesanta","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"vendor","counts":{"high":2,"all_time":10,"critical":2,"exploited":0,"last_7_days":0,"last_30_days":1,"last_90_days":10,"last_365_days":10},"latest":[{"cve":"CVE-2026-86716","cvss":7.3,"epss":0.0057,"slug":"cve-2026-86716-cesanta-mjs-heap-buffer-overflow-in-skip-spaces-and-comments","title":"Cesanta mJS heap buffer overflow in skip_spaces_and_comments","severity":"high","exploited":false,"published_at":"2026-09-08T19:20:17.357+00:00","url":"https://junglewise.ai/threats/cve-2026-86716-cesanta-mjs-heap-buffer-overflow-in-skip-spaces-and-comments"},{"cve":"CVE-2026-73259","cvss":5.4,"epss":0.0041,"slug":"cve-2026-73259-mongoose-reflected-cross-site-scripting-in-directory-listing","title":"Mongoose reflected cross-site scripting in directory listing","severity":"medium","exploited":false,"published_at":"2026-08-20T18:16:47.73+00:00","url":"https://junglewise.ai/threats/cve-2026-73259-mongoose-reflected-cross-site-scripting-in-directory-listing"},{"cve":"CVE-2026-73258","cvss":6.5,"epss":0.0046,"slug":"cve-2026-73258-mongoose-multipart-header-truncation-via-cr-lf-parsing","title":"Mongoose multipart header truncation via CR/LF parsing","severity":"medium","exploited":false,"published_at":"2026-08-20T18:16:47.323+00:00","url":"https://junglewise.ai/threats/cve-2026-73258-mongoose-multipart-header-truncation-via-cr-lf-parsing"},{"cve":"CVE-2026-73257","cvss":9.1,"epss":0.0067,"slug":"cve-2026-73257-mongoose-http-request-desynchronization","title":"Mongoose HTTP request desynchronization","severity":"critical","exploited":false,"published_at":"2026-08-20T18:16:46.973+00:00","url":"https://junglewise.ai/threats/cve-2026-73257-mongoose-http-request-desynchronization"},{"cve":"CVE-2026-73256","cvss":9.1,"epss":0.0067,"slug":"cve-2026-73256-mongoose-http-1-0-request-smuggling-via-chunked-encoding","title":"Mongoose HTTP/1.0 request smuggling via chunked encoding","severity":"critical","exploited":false,"published_at":"2026-08-20T18:16:46.523+00:00","url":"https://junglewise.ai/threats/cve-2026-73256-mongoose-http-1-0-request-smuggling-via-chunked-encoding"},{"cve":"CVE-2026-73255","cvss":6.5,"epss":0.0079,"slug":"cve-2026-73255-cesanta-mongoose-directory-traversal-in-ssi-processing","title":"Cesanta Mongoose directory traversal in SSI processing","severity":"medium","exploited":false,"published_at":"2026-08-20T18:16:46.313+00:00","url":"https://junglewise.ai/threats/cve-2026-73255-cesanta-mongoose-directory-traversal-in-ssi-processing"},{"cve":"CVE-2026-73254","cvss":5.4,"epss":0.0034,"slug":"cve-2026-73254-cesanta-mongoose-stored-cross-site-scripting-in-directory-listing","title":"Cesanta Mongoose stored cross-site scripting in directory listing","severity":"medium","exploited":false,"published_at":"2026-08-20T18:16:46.113+00:00","url":"https://junglewise.ai/threats/cve-2026-73254-cesanta-mongoose-stored-cross-site-scripting-in-directory-listing"},{"cve":"CVE-2026-73253","cvss":6.5,"epss":0.0035,"slug":"cve-2026-73253-mongoose-wildcard-certificate-hostname-verification-bypass","title":"Mongoose wildcard certificate hostname verification bypass","severity":"info","exploited":false,"published_at":"2026-08-20T18:16:45.94+00:00","url":"https://junglewise.ai/threats/cve-2026-73253-mongoose-wildcard-certificate-hostname-verification-bypass"},{"cve":"CVE-2026-73251","epss":0.0033,"slug":"cve-2026-73251-mongoose-tls-certificate-chain-verification-bypass-with-ca","title":"Mongoose TLS certificate-chain verification bypass with CA bundles","severity":"info","exploited":false,"published_at":"2026-08-20T18:16:45.743+00:00","url":"https://junglewise.ai/threats/cve-2026-73251-mongoose-tls-certificate-chain-verification-bypass-with-ca"},{"cve":"CVE-2026-11404","cvss":7.5,"slug":"cve-2026-11404-cesanta-mongoose-out-of-bounds-read-in-mg-tls-server-recv-hello","title":"Cesanta Mongoose out-of-bounds read in mg_tls_server_recv_hello","severity":"high","exploited":false,"published_at":"2026-07-09T16:16:34.64+00:00","url":"https://junglewise.ai/threats/cve-2026-11404-cesanta-mongoose-out-of-bounds-read-in-mg-tls-server-recv-hello"}],"vendor":{"hub":true,"name":"Cesanta","slug":"cesanta","url":"https://junglewise.ai/threats/vendors/cesanta"},"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":1},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":2,"exploited":0,"vulnerabilities":8},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":1},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0}],"most_severe":[{"cve":"CVE-2026-73257","cvss":9.1,"epss":0.0067,"slug":"cve-2026-73257-mongoose-http-request-desynchronization","title":"Mongoose HTTP request desynchronization","severity":"critical","exploited":false,"published_at":"2026-08-20T18:16:46.973+00:00","url":"https://junglewise.ai/threats/cve-2026-73257-mongoose-http-request-desynchronization"},{"cve":"CVE-2026-73256","cvss":9.1,"epss":0.0067,"slug":"cve-2026-73256-mongoose-http-1-0-request-smuggling-via-chunked-encoding","title":"Mongoose HTTP/1.0 request smuggling via chunked encoding","severity":"critical","exploited":false,"published_at":"2026-08-20T18:16:46.523+00:00","url":"https://junglewise.ai/threats/cve-2026-73256-mongoose-http-1-0-request-smuggling-via-chunked-encoding"},{"cve":"CVE-2026-11404","cvss":7.5,"slug":"cve-2026-11404-cesanta-mongoose-out-of-bounds-read-in-mg-tls-server-recv-hello","title":"Cesanta Mongoose out-of-bounds read in mg_tls_server_recv_hello","severity":"high","exploited":false,"published_at":"2026-07-09T16:16:34.64+00:00","url":"https://junglewise.ai/threats/cve-2026-11404-cesanta-mongoose-out-of-bounds-read-in-mg-tls-server-recv-hello"},{"cve":"CVE-2026-86716","cvss":7.3,"epss":0.0057,"slug":"cve-2026-86716-cesanta-mjs-heap-buffer-overflow-in-skip-spaces-and-comments","title":"Cesanta mJS heap buffer overflow in skip_spaces_and_comments","severity":"high","exploited":false,"published_at":"2026-09-08T19:20:17.357+00:00","url":"https://junglewise.ai/threats/cve-2026-86716-cesanta-mjs-heap-buffer-overflow-in-skip-spaces-and-comments"},{"cve":"CVE-2026-73255","cvss":6.5,"epss":0.0079,"slug":"cve-2026-73255-cesanta-mongoose-directory-traversal-in-ssi-processing","title":"Cesanta Mongoose directory traversal in SSI processing","severity":"medium","exploited":false,"published_at":"2026-08-20T18:16:46.313+00:00","url":"https://junglewise.ai/threats/cve-2026-73255-cesanta-mongoose-directory-traversal-in-ssi-processing"},{"cve":"CVE-2026-73258","cvss":6.5,"epss":0.0046,"slug":"cve-2026-73258-mongoose-multipart-header-truncation-via-cr-lf-parsing","title":"Mongoose multipart header truncation via CR/LF parsing","severity":"medium","exploited":false,"published_at":"2026-08-20T18:16:47.323+00:00","url":"https://junglewise.ai/threats/cve-2026-73258-mongoose-multipart-header-truncation-via-cr-lf-parsing"},{"cve":"CVE-2026-73259","cvss":5.4,"epss":0.0041,"slug":"cve-2026-73259-mongoose-reflected-cross-site-scripting-in-directory-listing","title":"Mongoose reflected cross-site scripting in directory listing","severity":"medium","exploited":false,"published_at":"2026-08-20T18:16:47.73+00:00","url":"https://junglewise.ai/threats/cve-2026-73259-mongoose-reflected-cross-site-scripting-in-directory-listing"},{"cve":"CVE-2026-73254","cvss":5.4,"epss":0.0034,"slug":"cve-2026-73254-cesanta-mongoose-stored-cross-site-scripting-in-directory-listing","title":"Cesanta Mongoose stored cross-site scripting in directory listing","severity":"medium","exploited":false,"published_at":"2026-08-20T18:16:46.113+00:00","url":"https://junglewise.ai/threats/cve-2026-73254-cesanta-mongoose-stored-cross-site-scripting-in-directory-listing"},{"cve":"CVE-2026-73253","cvss":6.5,"epss":0.0035,"slug":"cve-2026-73253-mongoose-wildcard-certificate-hostname-verification-bypass","title":"Mongoose wildcard certificate hostname verification bypass","severity":"info","exploited":false,"published_at":"2026-08-20T18:16:45.94+00:00","url":"https://junglewise.ai/threats/cve-2026-73253-mongoose-wildcard-certificate-hostname-verification-bypass"},{"cve":"CVE-2026-73251","epss":0.0033,"slug":"cve-2026-73251-mongoose-tls-certificate-chain-verification-bypass-with-ca","title":"Mongoose TLS certificate-chain verification bypass with CA bundles","severity":"info","exploited":false,"published_at":"2026-08-20T18:16:45.743+00:00","url":"https://junglewise.ai/threats/cve-2026-73251-mongoose-tls-certificate-chain-verification-bypass-with-ca"}],"generated_at":"2026-09-26T09:11:00.170868+00:00","technologies":[]}