{"api_version":"1","generated_at":"2026-07-23T14:57:13+00:00","cve":"CVE-2026-59139","urls":{"html":"https://cve.report/CVE-2026-59139","api":"https://cve.report/api/cve/CVE-2026-59139.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-59139","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-59139"},"summary":{"title":"Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked","description":"Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked.\n\nThe attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap'd segment and never bounded against the arena capacity (req_arena_cap).\n\nA local peer that can write the backing file can leave the header valid while poisoning a request slot's offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process.","state":"PUBLISHED","assigner":"CPANSec","published_at":"2026-07-21 19:17:11","updated_at":"2026-07-22 20:17:02"},"problem_types":["CWE-125","CWE-125 CWE-125 Out-of-bounds 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out-","CVE":"CVE-2026-59139","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"59139","Ordinal":"1","NoteData":"Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked.\n\nThe attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap'd segment and never bounded against the arena capacity (req_arena_cap).\n\nA local peer that can write the backing file can leave the header valid while poisoning a request slot's offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process.","Type":"Description","Title":"Data::ReqRep::Shared versions before 0.05 for Perl allow an out-"}]}}}