{"id":"CVE-2026-26457","details":"ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a null pointer dereference vulnerability in the coap_dump_msg() function when processing COAP messages containing options with zero length.","modified":"2026-10-28T02:30:26.652931607Z","published":"2026-08-27T00:00:00Z","database_specific":{"cna_assigner":"mitre","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26457.json"},"references":[{"type":"WEB","url":"https://github.com/songxpu/bug_report/blob/master/CoAP/ccoap/VULNERABILITY_REPORT2.md"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26457.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26457"},{"type":"PACKAGE","url":"https://github.com/ipflavors/ccoap"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ipflavors/ccoap","events":[{"introduced":"0"},{"last_affected":"77f55c4b466e99327c24ace8a2913d3ba7e2ccd5"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"last_affected":"77f55c4b466e99327c24ace8a2913d3ba7e2ccd5"}],"source":"DESCRIPTION"}]}}],"versions":["v1.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26457.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}