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vuln-cve/data/2026/42xxx/CVE-2026-42810.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-42810",
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"state": "PUBLISHED",
"assignerShortName": "apache",
"dateReserved": "2026-04-30T14:22:36.663Z",
"datePublished": "2026-05-04T16:48:49.754Z",
"dateUpdated": "2026-05-04T18:33:09.056Z"
},
"containers": {
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"affected": [
{
"defaultStatus": "unaffected",
"product": "Apache Polaris",
"vendor": "Apache Software Foundation",
"versions": [
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"lessThan": "1.4.1",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
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"value": "<span style=\"background-color: rgb(255, 255, 255);\">Apache Polaris accepts literal `*` characters in namespace and table names. When it\nlater builds temporary S3 access policies for delegated table access, those\nsame characters appear to be reused unescaped in S3 IAM resource patterns\nand\n`s3:prefix` conditions.\n<br><br>\nIn S3 IAM policy matching, `*` is treated as a wildcard rather than as\nordinary text. That means temporary credentials issued for one crafted table\ncan match the storage path of a different table.\n<br><br>\nIn private testing against Polaris 1.4.0 using Polaris' AWS S3 temporary-\ncredential path on both MinIO and real AWS S3, credentials returned for\ncrafted tables such as `f*.t1`, `f*.*`, `*.*`, and `foo.*` could reach other\ntables' S3 locations.\n<br>\nThe confirmed behavior includes:\n<br>\n- reading another table's metadata control file ([Iceberg metadata JSON]);\n<br>- listing another table's exact S3 table prefix ([table prefix]);\n<br>- and, when write delegation was returned for the crafted table, creating\nand\ndeleting an object under another table's exact S3 table prefix.\n<br><br>\nA control case using ordinary different names did not allow the same\ncross-table access.\n<br><br>\n<span style=\"background-color: rgb(255, 255, 255);\">A least-privilege AWS S3 variant was also confirmed in which the attacker\nprincipal had no Polaris permissions on the victim table and only the\nminimal permissions required to create and use a crafted wildcard table\n(namespace-scoped `TABLE_CREATE` and `TABLE_WRITE_DATA` on `*`).</span> In that\nsetup, direct Polaris access to `foo.t1` remained forbidden, but the\nattacker\ncould still create and load `*.*`, receive delegated S3 credentials, and use\nthose credentials to list, read, create, and delete objects under `foo.t1`.\n<br><br>\nIn Iceberg, the metadata JSON file is a control file: it tells readers which\ndata files belong to the table, which snapshots exist, and which table\nversion\nto read. So unauthorized access to it is already a meaningful\nconfidentiality\nproblem. The confirmed write-capable variant means the issue is not limited\nto\ndisclosure.</span><br>"
}
],
"value": "Apache Polaris accepts literal `*` characters in namespace and table names. When it\nlater builds temporary S3 access policies for delegated table access, those\nsame characters appear to be reused unescaped in S3 IAM resource patterns\nand\n`s3:prefix` conditions.\n\n\n\nIn S3 IAM policy matching, `*` is treated as a wildcard rather than as\nordinary text. That means temporary credentials issued for one crafted table\ncan match the storage path of a different table.\n\n\n\nIn private testing against Polaris 1.4.0 using Polaris' AWS S3 temporary-\ncredential path on both MinIO and real AWS S3, credentials returned for\ncrafted tables such as `f*.t1`, `f*.*`, `*.*`, and `foo.*` could reach other\ntables' S3 locations.\n\n\nThe confirmed behavior includes:\n\n\n- reading another table's metadata control file ([Iceberg metadata JSON]);\n\n- listing another table's exact S3 table prefix ([table prefix]);\n\n- and, when write delegation was returned for the crafted table, creating\nand\ndeleting an object under another table's exact S3 table prefix.\n\n\n\nA control case using ordinary different names did not allow the same\ncross-table access.\n\n\n\nA least-privilege AWS S3 variant was also confirmed in which the attacker\nprincipal had no Polaris permissions on the victim table and only the\nminimal permissions required to create and use a crafted wildcard table\n(namespace-scoped `TABLE_CREATE` and `TABLE_WRITE_DATA` on `*`). In that\nsetup, direct Polaris access to `foo.t1` remained forbidden, but the\nattacker\ncould still create and load `*.*`, receive delegated S3 credentials, and use\nthose credentials to list, read, create, and delete objects under `foo.t1`.\n\n\n\nIn Iceberg, the metadata JSON file is a control file: it tells readers which\ndata files belong to the table, which snapshots exist, and which table\nversion\nto read. So unauthorized access to it is already a meaningful\nconfidentiality\nproblem. The confirmed write-capable variant means the issue is not limited\nto\ndisclosure."
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"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 9.4,
"baseSeverity": "CRITICAL",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "HIGH",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
"version": "4.0",
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
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"scope": "CHANGED",
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"cweId": "CWE-116",
"description": "CWE-116 Improper Encoding or Escaping of Output",
"lang": "en",
"type": "CWE"
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},
{
"descriptions": [
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"cweId": "CWE-20",
"description": "CWE-20 Improper Input Validation",
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"providerMetadata": {
"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"shortName": "apache",
"dateUpdated": "2026-05-04T16:48:49.754Z"
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"references": [
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"tags": [
"vendor-advisory"
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"url": "https://lists.apache.org/thread/gg3qq9sqg4hdjmprqy46p40xmln61dm9"
}
],
"source": {
"discovery": "INTERNAL"
},
"title": "Apache Polaris: could broaden vended S3 credentials through wildcard-bearing namespace or table names",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
},
"adp": [
{
"title": "CVE Program Container",
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/05/02/11"
}
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"dateUpdated": "2026-05-04T17:37:04.202Z"
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"content": {
"timestamp": "2026-05-04T18:32:53.859435Z",
"id": "CVE-2026-42810",
"options": [
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"Exploitation": "none"
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{
"Automatable": "no"
},
{
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"version": "2.0.3"
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"title": "CISA ADP Vulnrichment",
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