CVE-2026-123096: anacrolix torrent

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

CVSS 7.1 High

Published by the CVE Program (CNA: VulnCheck) at 5 Nov 2026, 15:11 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
anacrolix	torrent https://pkg.go.dev pkg:golang/github.com/anacrolix/torrent	affected 1.61.0 and earlier semver Other versions: unaffected

Identifiers

CVE-2026-123096

CNA

VulnCheck

Weakness (CWE)

CWE-770

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.1	High	4.0	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	CNA (VulnCheck)Used for this record
6.5	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS No score.

Timeline

5 Nov 2026, 15:11 UTC Confirmed by the CVE List
5 Nov 2026, 15:24 UTC First seen by agentprime
5 Nov 2026, 16:17 UTC Confirmed by NVD

Sources

References from the CNA

github.com/anacrolix/torrent/pull/1143 issue-trackingpatch
github.com/anacrolix/torrent/commit/92ad51490479bb8b94720f964b1c67e5a1d68faa patch
github.com/anacrolix/torrent/blob/v1.61.0/tracker/http/http.go#L114-L126 technical-description
github.com/anacrolix/torrent product
www.vulncheck.com/advisories/anacrolix-torrent-through-1.61.0-memory-exhaustion-via-unbounded-http-tracker-response third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.