{"id":"CVE-2026-23749","state":"PUBLISHED","title":"Golioth Firmware SDK < 0.22.0 Blockwise Transfer Path Out-of-Bounds Read","description":"Golioth Firmware SDK version 0.19.1 prior to 0.22.0, fixed in commit 0e788217, contain an out-of-bounds read due to improper null termination of a blockwise transfer path. blockwise_transfer_init() accepts a path whose length equals CONFIG_GOLIOTH_COAP_MAX_PATH_LEN and copies it using strncpy() without guaranteeing a trailing NUL byte, leaving ctx->path unterminated. A later strlen() on this buffer (in golioth_coap_client_get_internal()) can read past the end of the allocation, resulting in a crash/denial of service. The input is application-controlled (not network by default).","publishedAt":"2026-02-26T17:32:30.795Z","updatedAt":"2026-07-14T15:53:37.722Z","severity":{"score":2.1,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["Golioth Firmware SDK"],"affected":[{"vendor":"Golioth","product":"Firmware SDK","packageURL":"pkg:github/golioth/golioth-firmware-sdk","defaultStatus":"unaffected","versions":[{"version":"0.19.1","status":"affected","lessThan":"0.22.0","versionType":"semver"},{"version":"0e788217ab4b61a7c1d9fadd1b4a40f5f538a26d","status":"unaffected","versionType":"git"}],"repo":"https://github.com/golioth/golioth-firmware-sdk"}],"references":["https://secmate.dev/disclosures/SECMATE-2025-0017","https://blog.secmate.dev/posts/golioth-vulnerabilities-disclosure/","https://github.com/golioth/golioth-firmware-sdk/releases/tag/v0.22.0","https://github.com/golioth/golioth-firmware-sdk/commit/0e788217ab4b61a7c1d9fadd1b4a40f5f538a26d","https://www.vulncheck.com/advisories/golioth-firmware-sdk-blockwise-transfer-path-out-of-bounds-read"],"weaknesses":["CWE-170"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23749.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23749","state":"PUBLISHED","datePublished":"2026-02-26T17:32:30.795Z","dateUpdated":"2026-07-14T15:53:37.722Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-01-15T18:42:20.938Z"},"containers":{"cna":{"title":"Golioth Firmware SDK < 0.22.0 Blockwise Transfer Path Out-of-Bounds Read","descriptions":[{"lang":"en","value":"Golioth Firmware SDK version 0.19.1 prior to 0.22.0, fixed in commit 0e788217, contain an out-of-bounds read due to improper null termination of a blockwise transfer path. blockwise_transfer_init() accepts a path whose length equals CONFIG_GOLIOTH_COAP_MAX_PATH_LEN and copies it using strncpy() without guaranteeing a trailing NUL byte, leaving ctx->path unterminated. A later strlen() on this buffer (in golioth_coap_client_get_internal()) can read past the end of the allocation, resulting in a crash/denial of service. 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