{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-59139", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-07-02T16:24:17.912Z", "datePublished": "2026-07-21T19:02:43.033Z", "dateUpdated": "2026-07-21T19:02:43.033Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "Data-ReqRep-Shared", "product": "Data::ReqRep::Shared", "programFiles": ["reqrep.h"], "programRoutines": [{"name": "reqrep_recv_locked"}], "repo": "https://github.com/vividsnow/perl5-data-reqrep-shared", "vendor": "EGOR", "versions": [{"lessThan": "0.05", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-07-21T19:02:43.033Z"}, "references": [{"url": "https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/diff/EGOR/Data-ReqRep-Shared-0.04#reqrep.h"}, {"tags": ["release-notes"], "url": "https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/changes"}], "solutions": [{"lang": "en", "value": "Upgrade to Data::ReqRep::Shared 0.05 or later, which bounds the arena offset and length against the arena capacity before the copy."}], "source": {"discovery": "UNKNOWN"}, "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", "workarounds": [{"lang": "en", "value": "For deployments that cannot upgrade to 0.05, place the backing file in a directory writable only by the owning user, so a local peer cannot tamper with the segment contents the read path trusts."}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}}}}

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