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vuln-cve/data/2026/88xxx/CVE-2026-88355.json
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{
"dataType": "CVE_RECORD",
"cveMetadata": {
"state": "PUBLISHED",
"cveId": "CVE-2026-88355",
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"dateUpdated": "2026-10-06T17:42:50.871Z",
"dateReserved": "2026-09-10T00:00:00.000Z",
"datePublished": "2026-09-24T00:00:00.000Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre",
"dateUpdated": "2026-09-24T15:27:36.765Z"
},
"descriptions": [
{
"lang": "en",
"value": "An incorrect buffer size calculation vulnerability exists in tinyexpr commit 4a7456e in new_expr(). For arity-0 expression nodes, including constants, variables, and zero-argument functions, the function allocates less memory than sizeof(te_expr) but treats the returned allocation as a complete te_expr object. This results in undefined behavior and can cause deterministic process termination in UBSan-instrumented builds."
}
],
"affected": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"version": "n/a",
"status": "affected"
}
]
}
],
"references": [
{
"url": "https://github.com/codeplea/tinyexpr/issues/145"
},
{
"url": "https://github.com/szaydel/tinyexpr/commit/fe7459728c2ab8d2f91365abe56601cdd0e24f9b"
}
],
"problemTypes": [
{
"descriptions": [
{
"type": "text",
"lang": "en",
"description": "n/a"
}
]
}
]
},
"adp": [
{
"problemTypes": [
{
"descriptions": [
{
"type": "CWE",
"cweId": "CWE-131",
"lang": "en",
"description": "CWE-131 Incorrect Calculation of Buffer Size"
}
]
}
],
"references": [
{
"url": "https://github.com/codeplea/tinyexpr/issues/145",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
}
},
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-10-06T15:44:34.584065Z",
"id": "CVE-2026-88355",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-06T17:42:50.871Z"
}
}
]
},
"dataVersion": "5.2"
}