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Crypt::PBKDF2 versions before 0.261630 for Perl have a...

Moderate severity Unreviewed Published Jun 12, 2026 to the GitHub Advisory Database • Updated Jun 13, 2026

Package

No package listed— Suggest a package

Affected versions

Unknown

Patched versions

Unknown

Description

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.

References

Published by the National Vulnerability Database Jun 12, 2026
Published to the GitHub Advisory Database Jun 12, 2026
Last updated Jun 13, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS score

Weaknesses

Use of Password Hash With Insufficient Computational Effort

The product generates a hash for a password, but it uses a scheme that does not provide a sufficient level of computational effort that would make password cracking attacks infeasible or expensive. Learn more on MITRE.

CVE ID

CVE-2026-9641

GHSA ID

GHSA-v9r4-9w2c-2xcp

Source code

No known source code

Dependabot alerts are not supported on this advisory because it does not have a package from a supported ecosystem with an affected and fixed version.

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