Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations

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Summary

CVECVE-2026-9641
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-12 16:16:35 UTC
Updated2026-06-12 18:16:36 UTC
DescriptionCrypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations. The default algorithm is HMAC-SHA1, which should only be used for legacy systems. These versions default to using 1000 iterations. Depending on the chosen algorithm, 220,000 to 1,400,000 iterations should be used.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem Types: CWE-916 | CWE-916 CWE-916 Use of Password Hash With Insufficient Computational Effort

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA ARODLAND CryptPBKDF2 affected 0.261630 custom Not specified

References

ReferenceSourceLinkTags
metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
cheatsheetseries.owasp.org/cheatsheets/Password_Storage_Cheat_Sheet.html 9b29abf9-4ab0-4765-b253-1875cd9b441e cheatsheetseries.owasp.org
www.openwall.com/lists/oss-security/2026/06/12/5 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to version 0.261630 or later.

Workarounds

CNA: Change the default algorithm to something stronger, such as "HMACSHA2", and the output_len accordingly (32 for SHA256). The number of iterations should also be increased (600,000 for SHA256, for example).

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