{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-26453", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-08-27T13:46:37.416Z", "dateReserved": "2026-02-16T00:00:00.000Z", "datePublished": "2026-08-27T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-08-27T13:46:37.416Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/ipflavors/ccoap"}, {"url": "https://github.com/songxpu/bug_report/blob/master/CoAP/ccoap/VULNERABILITY_REPORT3.md"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}}, "dataVersion": "5.2"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-26453", "lastModified": "2026-08-27T17:17:48.033", "metrics": {}, "published": "2026-08-27T17:17:48.033", "references": [{"source": "cve@mitre.org", "url": "https://github.com/ipflavors/ccoap"}, {"source": "cve@mitre.org", "url": "https://github.com/songxpu/bug_report/blob/master/CoAP/ccoap/VULNERABILITY_REPORT3.md"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Received"}

{}

{"created": "2026-08-27T17:30:12.235537+00:00", "title": "Null Pointer Dereference Leading to Segmentation Fault in ccoap CoAP Server", "updated": "2026-08-27T17:30:12.235542+00:00", "vendors": [], "weaknesses": ["CWE-476"]}