CVE-2026-123096

anacrolix/torrent through 1.61.0 Memory Exhaustion via Unbounded HTTP Tracker Response

Published Nov 5, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Anacrolix
Anacrolix torrent
Vendors & Products Anacrolix
Anacrolix torrent
Type Values Removed Values Added
Description 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.
Title anacrolix/torrent through 1.61.0 Memory Exhaustion via Unbounded HTTP Tracker Response
First Time appeared Torrentflux Project
Torrentflux Project torrentflux
Weaknesses CWE-770
CPEs cpe:2.3:a:torrentflux_project:torrentflux:*:*:*:*:*:*:*:*
Vendors & Products Torrentflux Project
Torrentflux Project torrentflux
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 9, 2026, 4:51 PM
Reserved
Nov 5, 2026, 12:22 PM
Status
Awaiting Analysis
Published
Nov 5, 2026, 4:17 PM
Modified
Nov 12, 2026, 8:57 PM
Severity
Moderate
Public date
Nov 5, 2026, 3:11 PM