Name: CVE-2026-9641: Use of Password Hash With Insufficient Computational Effort
Creator: Rapid7
Published: 2026-06-12T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-9641, CWE-916, CVSS 5.3, EPSS 0.00287

Crypt::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.

CVSS Details

CVSS 3.1 Base Score: 5.3
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade libcrypt-pbkdf2-perl	Jul 12, 2026	Jul 12, 2026

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CVSS Details

Covered by Rapid7

Prioritise with Active Threat Intelligence