Is This vulnerability exploited in the wild?

No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

How severe is This vulnerability?

Critical severity, with a CVSS score of 9.8, published 11 May 2026.

Which products and versions are affected?

torrentpier/torrentpier (Packagist) <= 2.4.3; TorrentPier <= 2.4.3.

Is there a fix for This vulnerability?

A patch was published on 2026-05-11: Version 2.4.4 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is This vulnerability attacked?

It is attacked over the network, in a network appliance.

Check whether you run torrentpier/torrentpier (Packagist) or TorrentPier at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

TorrentPier PHP object injection in multiple components

Q: Is there a fix for This vulnerability?

A patch was published on 2026-05-11: Version 2.4.4 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is This vulnerability attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected?

Check whether you run torrentpier/torrentpier (Packagist) or TorrentPier at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Severity: critical · CVSS 9.8 · Published 2026-05-11

TorrentPier, a BitTorrent tracker engine, is vulnerable to a critical security flaw that allows attackers to inject malicious data into the system. By exploiting how the application handles internal data objects, an attacker could potentially take full control of the server or read sensitive files. This could lead to a total compromise of the tracker service and its underlying database.

Technologies: torrentpier/torrentpier (Packagist), TorrentPier. Vendors: Packagist, TorrentPier.

Quick answers

Is This vulnerability exploited in the wild?: No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
How severe is This vulnerability?: Critical severity, with a CVSS score of 9.8, published 11 May 2026.
Which products and versions are affected?: torrentpier/torrentpier (Packagist) <= 2.4.3; TorrentPier <= 2.4.3.
Is there a fix for This vulnerability?: A patch was published on 2026-05-11: Version 2.4.4 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is This vulnerability attacked?: It is attacked over the network, in a network appliance.
Am I affected?: Check whether you run torrentpier/torrentpier (Packagist) or TorrentPier at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

TorrentPier versions 2.4.3 and earlier are vulnerable to PHP Deserialization of Untrusted Data (CWE-502). The application fails to properly validate or sanitize data before passing it to the PHP unserialize() function. An attacker can exploit this by submitting specially crafted serialized objects, potentially triggering 'POP chains' (Property Oriented Programming) within the application's codebase. Successful exploitation can result in arbitrary code execution (RCE) or unauthorized file system access. The vulnerability is addressed in version 2.4.4.

Affected products

torrentpier torrentpier <= 2.4.3

Timeline

2024-07-13: disclosed: Initial report by PHP Secure team
2026-05-11: advisory: GitHub Advisory published
2026-05-11: patched: Version 2.4.4 released

References

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