Quick answers
- Is CVE-2026-71832 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-71832 being exploited in the wild.
- How severe is CVE-2026-71832?
- Medium severity, with a CVSS score of 6.2, published 24 August 2026.
- Which products and versions are affected?
- Aria2 Project Aria2 1.37.0 and below.
- Is there a fix for CVE-2026-71832?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-71832 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-71832?
- Check whether anything you run is named in the advisory. 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
A divide-by-zero vulnerability exists in src/bittorrent_helper.cc, specifically in the processRootDictionary function. The flaw occurs when parsing a malicious torrent file where the pieceLength field is set to zero, which is then used as a divisor in a calculation without validation. An attacker can craft a malicious .torrent file and provide it to a user or service running Aria2; when the file is processed, the division-by-zero triggers an undefined behavior sanitizer error and causes a crash (Floating Point Exception). No authentication is required; the attack is triggered simply by providing a malicious torrent file to the application.
Affected products
- Aria2 Project Aria2 1.37.0 and below
Timeline
- 2026-07-28: disclosed: Issue reported on GitHub
- 2026-08-24: advisory: CVE published