VulnerabilityDeferred

CVE-2026-6656

This allows discrepancies in timing to be used to guess the underlying hash.

HIGH 7.5EPSS 0.49%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.49% probability · 41th percentile
CISA KEV: Not listed
Weakness: CWE-208
Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

References

https://metacpan.org/release/DRSTEVE/Crypt-Password-0.28/source/lib/Crypt/Password.pm#L190-193
https://rt.cpan.org/Ticket/Display.html?id=180162
http://www.openwall.com/lists/oss-security/2026/07/20/4

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.