{"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": "2026-11-04T21:45:21.130Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "readest", "vendor": "readest", "versions": [{"status": "affected", "version": "< 0.11.10"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-57565", "lastModified": "2026-11-04T22:18:06.680", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-04T22:18:06.680", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/readest/readest/commit/495783d04516d05b2eb10f8f8bad297d436b36de"}, {"source": "security-advisories@github.com", "url": "https://github.com/readest/readest/pull/4638"}, {"source": "security-advisories@github.com", "url": "https://github.com/readest/readest/releases/tag/v0.11.10"}, {"source": "security-advisories@github.com", "url": "https://github.com/readest/readest/security/advisories/GHSA-mfmj-2frf-vhgw"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}