SANKO Net::BitTorrent up to 2.0.1 on Perl allocation of resources

Summaryinfo

A vulnerability labeled as problematic has been found in SANKO Net::BitTorrent up to 2.0.1 on Perl. Affected by this issue is some unknown functionality. Such manipulation leads to allocation of resources. This vulnerability is traded as CVE-2026-57080. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in SANKO Net::BitTorrent up to 2.0.1 on Perl. It has been rated as problematic. Affected by this issue is an unknown part. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

Net::BitTorrent versions through 2.0.1 for Perl allow remote memory exhaustion via an uncapped peer-wire message-length prefix. The peer-wire framing in _process_messages trusts the 4-byte length prefix sent by a connected peer with no upper bound, while receive_data appends every inbound byte to the input buffer. A peer announces a length prefix of up to about 4 GiB and then streams bytes; the decoder waits until the buffer holds the full message before processing it, so the buffer grows without limit. Peer connections are unauthenticated, so any peer in the swarm exhausts the downloading process's memory. The largest legitimate message is a 16 KiB piece block, so any announced length far above that is anomalous.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-57080 since 06/23/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-40289). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Peer-to-Peer Software

Vendor

• SANKO

Name

• Net::BitTorrent

Version

• 2.0.0
• 2.0.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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