{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-123203","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-05T17:58:50.914Z","datePublished":"2026-11-05T18:16:39.093Z","dateUpdated":"2026-11-05T18:16:39.093Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-05T18:16:39.093Z"},"datePublic":"2026-10-29T00:00:00.000Z","title":"NEURON through 9.0.2 Stack-based Buffer Overflow via CoreNEURON dataset tokens","descriptions":[{"lang":"en","value":"NEURON (CoreNEURON) through 9.0.2 contains a stack buffer overflow vulnerability that allows attackers to corrupt stack memory by supplying over-long tokens in a crafted model dataset. Attackers can place oversized version or mechanism-name tokens in bbcore_mech.dat, globals.dat, or files.dat loaded by nrniv-core to crash the process."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Stack-based Buffer Overflow","cweId":"CWE-121","type":"CWE"}]}],"affected":[{"vendor":"neuronsimulator","product":"NEURON","defaultStatus":"unaffected","versions":[{"version":"0","lessThanOrEqual":"9.0.2","status":"affected","versionType":"custom"}],"packageURL":"pkg:pypi/neuron","repo":"https://github.com/neuronsimulator/nrn"}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:neuron-ai:neuron:*:*:*:*:*:*:*:*","versionEndIncluding":"9.0.2"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"HIGH","baseScore":6.1,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/neuronsimulator/nrn/pull/3932","tags":["issue-tracking","patch"]},{"url":"https://github.com/neuronsimulator/nrn/commit/6e5a6578a3503c44ee0f19593e7ffb19812ef0e1","tags":["patch"]},{"url":"https://github.com/neuronsimulator/nrn/blob/ba5783378c0aa1d9ac95b4454bea94b15c63f75d/src/coreneuron/io/mk_mech.cpp#L81-L96","tags":["technical-description"]},{"name":"VulnCheck Advisory: NEURON through 9.0.2 Stack-based Buffer Overflow via CoreNEURON dataset tokens","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/neuron-through-9.0.2-stack-based-buffer-overflow-via-coreneuron-dataset-tokens"}],"credits":[{"lang":"en","value":"Deus Rex","type":"finder"},{"lang":"en","value":"Michael Hines (nrnhines)","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}}}}