{"id":"CVE-2026-123096","summary":"anacrolix/torrent through 1.61.0 Memory Exhaustion via Unbounded HTTP Tracker Response","details":"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.","modified":"2026-11-05T21:32:28.148079863Z","published":"2026-11-05T15:11:50.578Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123096.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-770"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123096.json"},{"type":"PACKAGE","url":"https://github.com/anacrolix/torrent"},{"type":"ARTICLE","url":"https://github.com/anacrolix/torrent/blob/v1.61.0/tracker/http/http.go#L114-L126"},{"type":"FIX","url":"https://github.com/anacrolix/torrent/commit/92ad51490479bb8b94720f964b1c67e5a1d68faa"},{"type":"FIX","url":"https://github.com/anacrolix/torrent/pull/1143"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123096"},{"type":"WEB","url":"https://pkg.go.dev"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/anacrolix-torrent-through-1.61.0-memory-exhaustion-via-unbounded-http-tracker-response"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/anacrolix/torrent","events":[{"introduced":"0"},{"last_affected":"486bcbe758e0cff0f750fcee9c26268a11250d77"},{"fixed":"92ad51490479bb8b94720f964b1c67e5a1d68faa"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"0"},{"last_affected":"1.61.0"}],"source":"AFFECTED_FIELD"},{"range":[{"fixed":"92ad51490479bb8b94720f964b1c67e5a1d68faa"}],"source":"REFERENCES_COMMIT"}]}}],"versions":["v1.61.0","downstreams/erigon/v3.3.2","downstreams/erigon/branch/release/3.3","downstreams/erigon/v3.3.0-rc.1","v1.60.0","downstreams/erigon/v3.1.0","downstreams/erigon/branch/release/3.2","downstreams/erigon/branch/release/3.1","downstreams/erigon/v3.1.0-rc1","v1.59.1","v1.59.0","v1.58.1","v1.58.0","v1.57.1","v1.57.0","v1.56.1","v1.56.0","v1.55.0","v1.54.0","v1.53.3","v1.53.1","downstreams/erigon/v2.51.0","v1.53.0","downstreams/erigon/v2.49.2","downstreams/erigon/v2.49.1","downstreams/erigon/v2.49.0","v1.52.5","v1.52.4","v1.52.3","v1.52.2","v1.52.1","v1.52.0","downstreams/erigon/v2.45.0","v1.51.3","downstreams/erigon/v2.44.0","v1.51.2","v1.51.1","v1.51.0","v1.50.0","v1.49.1","v1.49.0","downstreams/erigon/v2.40.0","v1.48.0","downstreams/erigon/v2.33.0","v1.47.0","downstreams/erigon/v2022.10.01","downstreams/erigon/v2.27.0","downstreams/erigon/v2022.08.02","downstreams/erigon/v2022.07.03","v1.46.0","v1.45.0","v1.44.0","downstreams/erigon/v2022.06.03","v1.43.1","downstreams/erigon/v2022.05.08","v1.43.0","downstreams/erigon/v2022.05.03","v1.42.0","downstreams/erigon/v2022.05.01","downstreams/erigon/v2022.04.04","v1.41.0","downstreams/erigon/v2022.04.03","v1.40.0","v1.40.1","v1.39.2","v1.39.1","v1.39.0","v1.38.0","v1.37.0","v1.36.0","v1.35.0","v1.33.0","v1.34.0","v1.32.0","v1.30.4","v1.30.3","v1.30.2","v1.30.1","v1.30.0","v1.29.2","v1.29.1","v1.29.0","v1.28.0","v1.27.0","v1.26.1","v1.26.0","v1.26.0-alpha.1","v1.25.0","v1.26.0-alpha","v1.24.0","v1.23.0","v1.22.0","v1.21.0","v1.20.0","v1.19.0","v1.18.0","v1.17.1","v1.17.0","v1.16.0","v1.15.0","v1.14.0","v1.13.0","v1.12.0","v1.11.0","v1.10.0","v1.9.0","v1.8.2","v1.8.1","v1.8.0","v1.7.1","v1.7.0","v1.6.0","v1.5.2","v1.5.1","v1.5.0","v1.4.0","v1.3.1","v1.3.0","v1.2.0","v1.1.4","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123096.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"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"}]}