CVE-2026-9638
Crypt::PBKDF2 versions before 0.261630 for Perl generate insecure random values for salts
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.
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
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Crypt::PBKDF2 versions before 0.261630 for Perl generate insecure random values for salts
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.
- Record
CVE-2026-9638- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
EUVDEUVD-2026-36456
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.
- Record
EUVD-2026-36456- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-3rw7-pf56-37cv
Crypt::PBKDF2 versions before 0.261630 for Perl generate insecure random values for salts. These...
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.
- Record
GHSA-3rw7-pf56-37cv- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-9638- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
OSV
Crypt::PBKDF2 versions before 0.261630 for Perl generate insecure random values for salts
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.
- Record
CVE-2026-9638- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-9638
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.
- Record
DEBIAN-CVE-2026-9638- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-9638
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.
- Record
UBUNTU-CVE-2026-9638- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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
| Package | Affected | Fixed |
|---|---|---|
libcrypt-pbkdf2-perlDebian:12 |
before 0.261630-1~deb13u1~deb12u1, plus listed versions 0.161520-2 |
0.261630-1~deb13u1~deb12u1 |
libcrypt-pbkdf2-perlDebian:13 |
before 0.261630-1~deb13u1, plus listed versions 0.161520-20.261630-1~deb13u1~deb12u1 |
0.261630-1~deb13u1 |
libcrypt-pbkdf2-perlDebian:14 |
before 0.261630-1, plus listed versions 0.161520-20.261630-1~deb13u10.261630-1~deb13u1~deb12u1 |
0.261630-1 |
libcrypt-pbkdf2-perlUbuntu:16.04:LTS |
All versions, plus listed versions 0.150900-10.160410-1 |
None known |
libcrypt-pbkdf2-perlUbuntu:18.04:LTS |
All versions, plus listed versions 0.161520-1 |
None known |
libcrypt-pbkdf2-perlUbuntu:20.04:LTS |
All versions, plus listed versions 0.161520-1 |
None known |
libcrypt-pbkdf2-perlUbuntu:22.04:LTS |
All versions, plus listed versions 0.161520-1 |
None known |
libcrypt-pbkdf2-perlUbuntu:24.04:LTS |
All versions, plus listed versions 0.161520-2 |
None known |
libcrypt-pbkdf2-perlUbuntu:25.10 |
All versions, plus listed versions 0.161520-2 |
None known |
libcrypt-pbkdf2-perlUbuntu:26.10 |
All versions, plus listed versions 0.161520-20.261630-1 |
None known |
libcrypt-pbkdf2-perlUbuntu:26.04:LTS |
All versions, plus listed versions 0.161520-2 |
None known |
perl-Crypt-PBKDF2openSUSE:Tumbleweed From an advisory covering 3 CVEs |
before 0.261630-1.1 | 0.261630-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-9638 is a high vulnerability (CVSS 7.5) 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 0.30%, the 23rd percentile. Fixed in libcrypt-pbkdf2-perl 0.261630-1~deb13u1~deb12u1.
References
metacpan.org/dist/Crypt-PBKDF2/source/lib/Crypt/PBKDF2.pm
openwall.com/lists/oss-security/2026/06/12/4
nvd.nist.gov/vuln/detail/CVE-2026-9638
github.com/advisories/GHSA-3rw7-pf56-37cv
cpan.org/modules
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security-tracker.debian.org/tracker/CVE-2026-9638
ubuntu.com/security/CVE-2026-9638
cve.org/CVERecord?id=CVE-2026-9638
lists.security.metacpan.org/cve-announce/msg/40932643
suse.com/security/cve/CVE-2017-20240