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vuln-cve/data/2026/57xxx/CVE-2026-57565.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-57565",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-06-24T18:49:56.206Z",
"datePublished": "2026-11-04T21:45:21.130Z",
"dateUpdated": "2026-11-05T20:11:46.274Z"
},
"containers": {
"cna": {
"title": "Readest: Cross-tenant object write via unsanitized fileName in /api/storage/upload (object-key path traversal)",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-22",
"lang": "en",
"description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/readest/readest/security/advisories/GHSA-mfmj-2frf-vhgw",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/readest/readest/security/advisories/GHSA-mfmj-2frf-vhgw"
},
{
"name": "https://github.com/readest/readest/pull/4638",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/readest/readest/pull/4638"
},
{
"name": "https://github.com/readest/readest/commit/495783d04516d05b2eb10f8f8bad297d436b36de",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/readest/readest/commit/495783d04516d05b2eb10f8f8bad297d436b36de"
},
{
"name": "https://github.com/readest/readest/releases/tag/v0.11.10",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/readest/readest/releases/tag/v0.11.10"
}
],
"affected": [
{
"vendor": "readest",
"product": "readest",
"versions": [
{
"version": "< 0.11.10",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-11-04T21:45:21.130Z"
},
"descriptions": [
{
"lang": "en",
"value": "Readest is a modern, feature-rich ebook reader designed for seamless cross-platform access and an intuitive reading experience. Prior to 0.11.10, the apps/readest-app/src/pages/api/storage/upload.ts route constructed an object key from the authenticated user's identifier and a client-controlled fileName without rejecting path separators or parent-directory traversal. In the R2 backend, apps/readest-app/src/utils/r2.ts placed that key into a new Request URL before signing it, and URL normalization collapsed parent-directory components so the resulting presigned PUT could escape the caller's namespace. An authenticated attacker who knew a target user identifier and book hash could overwrite or poison that user's stored book object and corrupt the associated file_key metadata; the exact cross-tenant escape was verified for the R2 backend. This issue is fixed in version 0.11.10."
}
],
"source": {
"advisory": "GHSA-mfmj-2frf-vhgw",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/readest/readest/security/advisories/GHSA-mfmj-2frf-vhgw",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-11-05T20:05:26.746679Z",
"id": "CVE-2026-57565",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"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": "2026-11-05T20:11:46.274Z"
}
}
]
}
}