{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55738","assignerOrgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","state":"PUBLISHED","assignerShortName":"TuranSec","dateReserved":"2026-06-17T12:59:17.620Z","datePublished":"2026-06-17T13:45:00.399Z","dateUpdated":"2026-08-10T11:44:14.850Z"},"containers":{"cna":{"providerMetadata":{"orgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","shortName":"TuranSec","dateUpdated":"2026-08-10T11:44:14.850Z"},"title":"Stack Buffer Overflow in rxi/microtar raw_to_header() via non-null-terminated TAR name field","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-121","description":"CWE-121 Stack-based Buffer Overflow","type":"CWE"}]},{"descriptions":[{"lang":"en","cweId":"CWE-170","description":"CWE-170 Improper Null Termination","type":"CWE"}]}],"affected":[{"vendor":"rxi","product":"microtar","collectionURL":"https://github.com/rxi/microtar","repo":"https://github.com/rxi/microtar","programFiles":["src/microtar.c"],"programRoutines":[{"name":"raw_to_header"}],"versions":[{"status":"affected","version":"0.1.0","versionType":"semver"}],"defaultStatus":"affected"}],"descriptions":[{"lang":"en","value":"A stack-based buffer overflow exists in the raw_to_header function in src/microtar.c in rxi microtar 0.1.0. The function copies the 100-byte name and linkname fields of a TAR header with strcpy without guaranteeing null termination of the source.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>A stack-based buffer overflow exists in the raw_to_header function in src/microtar.c in rxi microtar 0.1.0. The function copies the 100-byte name and linkname fields of a TAR header with strcpy without guaranteeing null termination of the source.</p>"}]}],"references":[{"url":"https://github.com/rxi/microtar/blob/master/src/microtar.c#L111","tags":["product"]},{"url":"https://github.com/rxi/microtar","tags":["product"]},{"url":"https://raw.githubusercontent.com/rxi/microtar/master/src/microtar.c","name":"Vulnerable source code: src/microtar.c (raw_to_header)","tags":["technical-description"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":8.8,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.7,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}],"credits":[{"lang":"en","value":"Saidakbarxon Maxsudxonov","type":"finder"}],"source":{"discovery":"EXTERNAL"},"datePublic":"2026-06-17T13:45:00.399Z"},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-17T15:00:50.582378Z","id":"CVE-2026-55738","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-17T15:00:58.607Z"}}]}}