How severe is CVE-2026-9641?

CVE-2026-9641 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-9641 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9641?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-9641 have an EU (EUVD) identifier?

Yes. CVE-2026-9641 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36470.

When was CVE-2026-9641 published?

CVE-2026-9641 was published on 2026-06-12 and last updated on 2026-06-17.

CVE-2026-9641

CVE-2026-9641 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-916.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36470
Weakness: CWE-916
Published: 2026-06-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-9641?: 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.
How severe is CVE-2026-9641?: CVE-2026-9641 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-9641 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-9641?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-9641 have an EU (EUVD) identifier?: Yes. CVE-2026-9641 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36470.
When was CVE-2026-9641 published?: CVE-2026-9641 was published on 2026-06-12 and last updated on 2026-06-17.

References

Other CWE-916 vulnerabilities

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