Vulnerability · Published Jul 20, 2026 · Assigned by CPANSec
CVE-2026-6656Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks
High 7.5
In plain English
A high-severity security flaw in Crypt::Password from DRSTEVE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 57.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | libcrypt-password-perl | no fix listed | DEBIAN-CVE-2026-6656 |
| Ubuntu:26.04:LTS | libcrypt-password-perl | no fix listed | UBUNTU-CVE-2026-6656 |
| Ubuntu:26.10 | libcrypt-password-perl | no fix listed | UBUNTU-CVE-2026-6656 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| DRSTEVE | Crypt::Password | 0 – through 0.28 |
Weakness: CWE-208 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N