CVE-2016-15059 Net::IDN::Punycode - Buffer Overflow

Net::IDN::Punycode < 2.301 for Perl contains a heap buffer overflow caused by unchecked writes past the output buffer in encode_punycode XS backend, letting attackers corrupt heap memory remotely, exploit requires crafted input string.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.42% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
22 September 2026
Updated
15 October 2026
Weakness
CWE-122

Vendor fix

Update to version 2.301 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs