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CVE-2026-9641

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

5.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
None

Exploit likelihood

0.23%Up 0.2 points since Jun 13, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

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

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.

Record
CVE-2026-9641
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-916
Updated
2026-11-02
EUVDEUVD-2026-36470 5.3

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.

Record
EUVD-2026-36470
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-v9r4-9w2c-2xcp 5.3

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

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.

Record
GHSA-v9r4-9w2c-2xcp
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-916
Updated
2026-11-02
NVD 5.3

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.

Record
CVE-2026-9641
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-916
Updated
2026-11-02
OSV 5.3

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

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.

Record
CVE-2026-9641
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-916
Updated
2026-11-02
OSVDEBIAN-CVE-2026-9641 5.3

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.

Record
DEBIAN-CVE-2026-9641
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2026-9641 5.3

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.

Record
UBUNTU-CVE-2026-9641
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
OSVopenSUSE-SU-2026:11034-1 No score

perl-Crypt-PBKDF2-0.261630-1.1 on GA media

These are all security issues fixed in the perl-Crypt-PBKDF2-0.261630-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11034-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libcrypt-pbkdf2-perl
Debian:12
 before 0.261630-1~deb13u1~deb12u1, plus listed versions
0.161520-2
0.261630-1~deb13u1~deb12u1
libcrypt-pbkdf2-perl
Debian:13
 before 0.261630-1~deb13u1, plus listed versions
0.161520-20.261630-1~deb13u1~deb12u1
0.261630-1~deb13u1
libcrypt-pbkdf2-perl
Debian:14
 before 0.261630-1, plus listed versions
0.161520-20.261630-1~deb13u10.261630-1~deb13u1~deb12u1
0.261630-1
libcrypt-pbkdf2-perl
Ubuntu:16.04:LTS
 All versions, plus listed versions
0.150900-10.160410-1
 None known
libcrypt-pbkdf2-perl
Ubuntu:18.04:LTS
 All versions, plus listed versions
0.161520-1
 None known
libcrypt-pbkdf2-perl
Ubuntu:20.04:LTS
 All versions, plus listed versions
0.161520-1
 None known
libcrypt-pbkdf2-perl
Ubuntu:22.04:LTS
 All versions, plus listed versions
0.161520-1
 None known
libcrypt-pbkdf2-perl
Ubuntu:24.04:LTS
 All versions, plus listed versions
0.161520-2
 None known
libcrypt-pbkdf2-perl
Ubuntu:25.10
 All versions, plus listed versions
0.161520-2
 None known
libcrypt-pbkdf2-perl
Ubuntu:26.10
 All versions, plus listed versions
0.161520-20.261630-1
 None known
libcrypt-pbkdf2-perl
Ubuntu:26.04:LTS
 All versions, plus listed versions
0.161520-2
 None known
perl-Crypt-PBKDF2
openSUSE:Tumbleweed
From an advisory covering 3 CVEs
 before 0.261630-1.1
0.261630-1.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-9641 is a medium vulnerability (CVSS 5.3) in Arodland Crypt::pbkdf2, published June 12, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.23%, the 13th percentile. Fixed in libcrypt-pbkdf2-perl 0.261630-1~deb13u1~deb12u1.

References

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