{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8463", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-05-13T11:08:17.272Z", "datePublished": "2026-05-13T12:40:35.917Z", "dateUpdated": "2026-05-13T12:40:35.917Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "Crypt-Argon2", "product": "Crypt::Argon2", "programFiles": ["lib/Crypt/Argon2.xs"], "programRoutines": [{"name": "Crypt::Argon2::argon2_verify"}], "repo": "https://github.com/Leont/crypt-argon2", "vendor": "LEONT", "versions": [{"lessThan": "0.031", "status": "affected", "version": "0.017", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "Crypt::Argon2 versions from 0.017 before 0.031 for Perl perform a heap out-of-bounds read in argon2_verify on empty encoded input.\n\nThe auto-detect form of argon2_verify passes encoded_len - 1 as the length argument to memchr without checking that encoded_len is non-zero. When the encoded string is empty, the size_t subtraction underflows to SIZE_MAX and memchr scans adjacent heap memory looking for a '$' separator byte.\n\nA caller that invokes argon2_verify against a stored hash that may legitimately be empty (for example a placeholder row or a NULL column materialised as an empty string) reads out-of-bounds heap memory, which can crash the process or leak the position of an adjacent '$' byte into subsequent parsing."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-126", "description": "CWE-126 Buffer Over-read", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-191", "description": "CWE-191 Integer Underflow (Wrap or Wraparound)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-05-13T12:40:35.917Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/Leont/crypt-argon2/commit/92eac03ce63d541e0ead7ea5a89b9b67ce0c0e64.patch"}, {"tags": ["release-notes"], "url": "https://metacpan.org/release/LEONT/Crypt-Argon2-0.031/changes"}], "solutions": [{"lang": "en", "value": "Upgrade to Crypt-Argon2 0.031 or later."}], "source": {"discovery": "UNKNOWN"}, "timeline": [{"lang": "en", "time": "2026-05-12T00:00:00.000Z", "value": "Issue reported."}, {"lang": "en", "time": "2026-05-13T00:00:00.000Z", "value": "Crypt-Argon2 0.031 released with fix."}], "title": "Crypt::Argon2 versions from 0.017 before 0.031 for Perl perform a heap out-of-bounds read in argon2_verify on empty encoded input", "x_generator": {"engine": "cpansec-cna-tool 0.1"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Crypt::Argon2 versions from 0.017 before 0.031 for Perl perform a heap out-of-bounds read in argon2_verify on empty encoded input.\n\nThe auto-detect form of argon2_verify passes encoded_len - 1 as the length argument to memchr without checking that encoded_len is non-zero. When the encoded string is empty, the size_t subtraction underflows to SIZE_MAX and memchr scans adjacent heap memory looking for a '$' separator byte.\n\nA caller that invokes argon2_verify against a stored hash that may legitimately be empty (for example a placeholder row or a NULL column materialised as an empty string) reads out-of-bounds heap memory, which can crash the process or leak the position of an adjacent '$' byte into subsequent parsing."}], "id": "CVE-2026-8463", "lastModified": "2026-05-13T14:18:17.140", "metrics": {}, "published": "2026-05-13T14:18:17.140", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/Leont/crypt-argon2/commit/92eac03ce63d541e0ead7ea5a89b9b67ce0c0e64.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/LEONT/Crypt-Argon2-0.031/changes"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-126"}, {"lang": "en", "value": "CWE-191"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{}