CVE-2026-6656 Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks
Attackers can exploit timing differences in password checks to guess password hashes, requiring an upgrade to the Perl Crypt::Password library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6656?
CVE-2026-6656 is a high-severity vulnerability in DRSTEVE Crypt::Password, published on 20 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-208
Which versions are affected by CVE-2026-6656?
How do I fix CVE-2026-6656?
No fix has been published for CVE-2026-6656 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-6656 being exploited?
There is no known exploitation of CVE-2026-6656 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-6656, GHSA-c9g9-v2j9-8ffv, UBUNTU-CVE-2026-6656.