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CVE-2026-8463

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. The 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. A caller that invokes argon2_verify against a stored hash that may legitim
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:677cee9885188809b01e017fb8674753cfa4009e76467bac021347279f04f596
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-191","description":"CWE-191 Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:db7c52220baef071a9c40fe2c9b511ca7642aa6d7c130795b43dd2fe779dbb94 · sha256:f89502b3d8b52e35… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-126","description":"CWE-126 Buffer Over-read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:db7c52220baef071a9c40fe2c9b511ca7642aa6d7c130795b43dd2fe779dbb94 · sha256:f89502b3d8b52e35… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"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"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:db7c52220baef071a9c40fe2c9b511ca7642aa6d7c130795b43dd2fe779dbb94 · sha256:f89502b3d8b52e35… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:db7c52220baef071a9c40fe2c9b511ca7642aa6d7c130795b43dd2fe779dbb94 · sha256:f89502b3d8b52e35… · /containers/adp/1/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-191","description":"CWE-191 Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:db7c52220baef071a9c40fe2c9b511ca7642aa6d7c130795b43dd2fe779dbb94 · sha256:f89502b3d8b52e35… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-126","description":"CWE-126 Buffer Over-read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:db7c52220baef071a9c40fe2c9b511ca7642aa6d7c130795b43dd2fe779dbb94 · sha256:f89502b3d8b52e35… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/05/13/4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db7c52220baef071a9c40fe2c9b511ca7642aa6d7c130795b43dd2fe779dbb94 · sha256:f89502b3d8b52e35… · /containers/adp/0/references/0
{"tags":["patch"],"url":"https://github.com/Leont/crypt-argon2/commit/92eac03ce63d541e0ead7ea5a89b9b67ce0c0e64.patch"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db7c52220baef071a9c40fe2c9b511ca7642aa6d7c130795b43dd2fe779dbb94 · sha256:f89502b3d8b52e35… · /containers/cna/references/0
{"tags":["release-notes"],"url":"https://metacpan.org/release/LEONT/Crypt-Argon2-0.031/changes"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db7c52220baef071a9c40fe2c9b511ca7642aa6d7c130795b43dd2fe779dbb94 · sha256:f89502b3d8b52e35… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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