CVE-2026-123096
anacrolix/torrent through 1.61.0 Memory Exhaustion via Unbounded HTTP Tracker Response
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
anacrolix/torrent through 1.61.0 contains a memory exhaustion vulnerability in the tracker/http package that allows malicious trackers to crash clients by returning unbounded responses. Attackers controlling an HTTP tracker in a torrent file or magnet link can return huge or gzip-compressed announce or scrape responses that Client.Announce and Client.Scrape buffer without limits, exhausting process memory.
| CWE | CWE-770 |
| Vendor | anacrolix |
| Product | torrent |
| Published | Nov 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
anacrolix / torrent
0 ≤ 1.61.0
References
github.com: https://github.com/anacrolix/torrent/pull/1143 github.com: https://github.com/anacrolix/torrent/commit/92ad51490479bb8b94720f964b1c67e5a1d68faa github.com: https://github.com/anacrolix/torrent/blob/v1.61.0/tracker/http/http.go#L114-L126 github.com: https://github.com/anacrolix/torrent vulncheck.com: https://www.vulncheck.com/advisories/anacrolix-torrent-through-1.61.0-memory-exhaustion-via-unbounded-http-tracker-response
Credits
Reload3d Matt Joiner (anacrolix)