ARODLAND Crypt::PBKDF2 up to 0.261629 on Perl rand weak prng

CVSS Meta Temp Score
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CTI Interest Score
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3.6$0-$5k5.99-

Summaryinfo

A vulnerability has been found in ARODLAND Crypt::PBKDF2 up to 0.261629 on Perl and classified as problematic. Affected by this vulnerability is the function rand. The manipulation leads to weak prng. This vulnerability is uniquely identified as CVE-2026-9638. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in ARODLAND Crypt::PBKDF2 up to 0.261629 on Perl. This issue affects the function rand. The manipulation with an unknown input leads to a weak prng vulnerability. Using CWE to declare the problem leads to CWE-338. The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong. Impacted is confidentiality. The summary by CVE is:

Crypt::PBKDF2 versions before 0.261630 for Perl generate insecure random values for salts. These versions use the built-in rand function, which is predictable and unsuitable for cryptography.

It is possible to read the advisory at metacpan.org. The identification of this vulnerability is CVE-2026-9638 since 05/26/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

Upgrading to version 0.261630 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-36456). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Weak prng
CWE: CWE-338 / CWE-331 / CWE-330
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Crypt::PBKDF2 0.261630

Timelineinfo

05/26/2026 CVE reserved
06/12/2026 +17 days Advisory disclosed
06/12/2026 +0 days VulDB entry created
06/12/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: metacpan.org
Status: Confirmed

CVE: CVE-2026-9638 (🔒)
GCVE (CVE): GCVE-0-2026-9638
GCVE (VulDB): GCVE-100-370667
EUVD: 🔒

Entryinfo

Created: 06/12/2026 19:38
Updated: 06/12/2026 21:32
Changes: 06/12/2026 19:38 (56), 06/12/2026 21:32 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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