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TI-2026-85478 Aliases CVE-2026-123096GHSA-xhrq-2ff6-99r3

Memory exhaustion in anacrolix/torrent via HTTP tracker responses

Priority LOW 31CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

anacrolix/torrent through 1.61.0 contains a memory exhaustion flaw in its tracker/http package. The client buffers HTTP tracker announce and scrape responses without any size limit (CWE-770). An attacker who controls an HTTP tracker in a torrent file or magnet link can return huge or gzip-compressed responses that exhaust process memory and crash the client when a user loads it.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

EPSS 0.00256 17th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
anacrolixtorrentup to 1.61.0—No fix listedCNA
  • torrent Vendoranacrolix Affected up to 1.61.0 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for anacrolix/torrent.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-11-05 Threatist record created from CVE-2026-123096
  2. 2026-11-05 Alias added: GHSA-xhrq-2ff6-99r3
  3. 2026-11-06 Affected versions changed · Red Hat
  4. 2026-11-06 CVSS score added · Red Hat
  5. 2026-11-07 Priority changed: MEDIUM → LOW

References

Patch 2

Other 2

Sources

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