CVE-2026-6656
Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks
Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks.
The check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash.
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::Password versions through 0.28 for Perl are susceptible to timing attacks
Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks.
The check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash.
- Record
CVE-2026-6656- 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-208
- Updated
- 2026-11-02
EUVDEUVD-2026-45894
Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks.
The check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash.
- Record
EUVD-2026-45894- 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-c9g9-v2j9-8ffv
Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks. The...
Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks.
The check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash.
- Record
GHSA-c9g9-v2j9-8ffv- 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-208
- Updated
- 2026-11-02
NVD
Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks.
The check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash.
- Record
CVE-2026-6656- 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-208
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-6656
Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks. The check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash.
- Record
DEBIAN-CVE-2026-6656- 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-2026-6656
Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks. The check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash.
- Record
UBUNTU-CVE-2026-6656- 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
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libcrypt-password-perlDebian:14 |
All versions, plus listed versions 0.28-10.28-2 |
None known |
libcrypt-password-perlUbuntu:26.10 |
All versions, plus listed versions 0.28-2 |
None known |
libcrypt-password-perlUbuntu:26.04:LTS |
All versions, plus listed versions 0.28-10.28-2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-6656 is a high vulnerability (CVSS 7.5) in Drsteve Crypt::password, published July 20, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.49%, the 42nd percentile. No source names a fixed version.
References
metacpan.org/release/DRSTEVE/Crypt-Password-0.28/source/lib/Crypt/Password.pm
rt.cpan.org/Ticket/Display.html?id=180162
openwall.com/lists/oss-security/2026/07/20/4
nvd.nist.gov/vuln/detail/CVE-2026-6656
github.com/advisories/GHSA-c9g9-v2j9-8ffv
security-tracker.debian.org/tracker/CVE-2026-6656
ubuntu.com/security/CVE-2026-6656
cve.org/CVERecord?id=CVE-2026-6656
lists.security.metacpan.org/cve-announce/msg/41975673