{"id":"CVE-2026-26453","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-26453","summary":"ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a null pointer dereference vulnerability in the coap_server_handle_session() function when processing COAP messages containing…","details":"ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a null pointer dereference vulnerability in the coap_server_handle_session() function when processing COAP messages containing URI_PATH options with NULL data pointers. When the server searches for a URI_PATH option matching the string \"separate\", it directly calls strncmp() on option_list[i].data without checking if the pointer is NULL. This causes a segmentation fault when the option's data field is NULL.","published":"2026-08-27T17:17:48.033","modified":"2026-09-01T19:17:20.190","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/ipflavors/ccoap"},{"type":"WEB","url":"https://github.com/songxpu/bug_report/blob/master/CoAP/ccoap/VULNERABILITY_REPORT3.md"},{"type":"WEB","url":"https://github.com/songxpu/bug_report/blob/master/CoAP/ccoap/VULNERABILITY_REPORT3.md"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-01T19:17:20.190"}}