CVE-2026-57081

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Source

https://cve.org/CVERecord?id=CVE-2026-57081

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57081.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-57081

Aliases

GHSA-mv44-v82p-89xv

Published

2026-06-30T11:05:14.658Z

Modified

2026-07-22T05:32:53.716029650Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

Net::BitTorrent versions through 2.1.0 for Perl allow remote memory exhaustion via deeply nested bencoded input

Details

Net::BitTorrent versions through 2.1.0 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 capture the whole remainder, so every live recursion frame keeps its own copy of the shrinking buffer (O(N^2) bytes for an N-deep input). The decoder runs on every untrusted bencode source: .torrent files, BEP09 metadata fetched from peers, DHT messages, and tracker responses.

A bencoded input of roughly 150,000 nested lists (about 150 KB on the wire) drives multi-gigabyte peak memory, so one short message from any peer, or one crafted .torrent file or magnet link, terminates the client.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57081.json",
    "cna_assigner": "CPANSec",
    "cwe_ids": [
        "CWE-400",
        "CWE-674"
    ]
}

References

Affected packages

Git / github.com/sanko/net-bittorrent.pm

Affected ranges

Type

GIT

Repo

https://github.com/sanko/net-bittorrent.pm

Events

Introduced

Fixed

8f5bed2edcf6e4ca81ea73817d0e3aa293fb10a2

Database specific

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2.1.0"
        },
        {
            "fixed": "2.1.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

v2.*

v2.0.0

v2.0.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57081.json"