CVE-2025-40910 Net::IP::LPM version 1.10 for Perl does not properly consider leading zero characters in IP CIDR address strings, which could allow attacker
Attackers can bypass IP-based access controls by using leading zeros in CIDR strings, confusing octal and decimal parsing in the Net::IP::LPM Perl 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-2025-40910?
CVE-2025-40910 is a medium-severity vulnerability, published on 27 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Net::IP::LPM version 1.10 for Perl does not properly consider leading zero characters in IP CIDR address strings, which could allow attackers to bypass access control that is based on IP addresses.
Leading zeros are used to indicate octal numbers, which can confuse users who are intentionally using octal notation, as well as users who believe they are using decimal notation.
Weakness: CWE-1287
Which versions are affected by CVE-2025-40910?
How do I fix CVE-2025-40910?
No fix has been published for CVE-2025-40910 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-40910 being exploited?
There is no known exploitation of CVE-2025-40910 in the wild and no public exploit code.
Sources
Also known as GHSA-7ffq-hwvw-j35c.