← CVE Radar
CVE-2026-123096anacrolix/torrent through 1.61.0 Memory Exhaustion via Unbounded HTTP Tracker Response
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.
7.1 HIGHEPSS 0.25%Not in KEVNVD: Received
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 7.1 | HIGH | 4.0VulnCheck (CNA) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 6.5 | MEDIUM | 3.1VulnCheck (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
Details
- CVE ID
- CVE-2026-123096
- Status
- Received
- Assigner (CNA)
- VulnCheck
- Published
- Nov 5, 2026
- Last modified
- 2026-11-05 16:17 UTC
- Weaknesses
- CWE-770 · Allocation of Resources Without Limits or Throttling
Affected Products
As published by the CNA in the CVE record.
anacrolixtorrent1 version range
- through 1.61.0
References
- github.com https://github.com/anacrolix/torrent
- github.com https://github.com/anacrolix/torrent/blob/v1.61.0/tracker/http/http.go#L114-L126
- github.com https://github.com/anacrolix/torrent/commit/92ad51490479bb8b94720f964b1c67e5a1d68faa
- github.com https://github.com/anacrolix/torrent/pull/1143
- vulncheck.com https://www.vulncheck.com/advisories/anacrolix-torrent-through-1.61.0-memory-exhaustion-via-unbounded-http-tracker-response