CVE-2026-123096

    Dashboard / Vulnerabilities / CVE-2026-123096

    CVE-2026-123096

    Published: 5 Nov 2026Last Modified: 7 Nov 2026

    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.

    References: https://pkg.go.dev, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123096.json, https://nvd.nist.gov/vuln/detail/CVE-2026-123096, https://www.vulncheck.com/advisories/anacrolix-torrent-through-1.61.0-memory-exhaustion-via-unbounded-http-tracker-response, https://github.com/anacrolix/torrent/commit/92ad51490479bb8b94720f964b1c67e5a1d68faa, https://github.com/anacrolix/torrent/pull/1143, https://github.com/anacrolix/torrent, https://github.com/anacrolix/torrent/blob/v1.61.0/tracker/http/http.go#L114-L126

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -92ad51490479bb8b94720f964b1c67e5a1d68faa

    Affected versions

    downstreams/erigon/branch/release/3.4

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-123096 | CVE-DB