CVE-2026-57081

CVE-2026-57081 affects Net::BitTorrent for Perl up to version 2.0.1. The root cause is unbounded recursion in the bdecode decoder: each nested list/dictionary level causes a recursive call that copies the remaining input buffer, producing O(N^2) memory growth for deeply nested inputs. In practice...

CVE-2026-57081 Net::BitTorrent versions through 2.0.1 for Perl allow remote memory exhaustion via deeply nested bencoded input

Net::BitTorrent versions through 2.0.1 for Perl allow remote memory exhaustion via deeply nested bencoded input. bdecode recurses once per nested list or dictionary level with no depth cap, and each recursive call receives the remaining buffer by value while the list and dictionary branches captu...