Remote Memory Exhaustion Vulnerability in Net::BitTorrent by Sanko
CVE-2026-57081

7.5HIGH

Key Information:

Vendor

Sanko

Status
Net::bittorrent
Vendor
CVE Published:
30 June 2026

What is CVE-2026-57081?

The vulnerability in Net::BitTorrent for Perl enables malicious users to induce remote memory exhaustion. This occurs due to a lack of depth limitation in the bencoding decoding process, which can be exploited by sending deeply nested bencoded input. When a crafted .torrent file or a manipulated peer message containing approximately 150,000 nested lists is received, it results in multi-gigabyte memory spikes and can potentially crash the client. The issue poses a significant risk as the decoder processes data from untrusted sources, including .torrent files and DHT messages.

Affected Version(s)

Net::BitTorrent 0 <= 2.0.1

References

https://github.com/sanko/Net-BitTorrent.pm/security/advis...
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.