Vulnerability in Torproject Tor
CVE-2026-44601
Tor before 0.4.9.7, when circuit queue memory pressure exists, can experience a client crash because of a double close of a circuit, aka TROVE-2026-009.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.006 (47.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.003
Affected products
- Torproject Tor — versions 0
Weakness classification (CWE)
References
- forum.torproject.org/c/news/tor-release-announcement/28 (Release Notes)
- gitlab.torproject.org/tpo/core/tor/-/commit/d4e3f6a440b58c2be661decf20c09548704… (Patch)
- gitlab.torproject.org/tpo/core/tor/-/work_items/41237 (Not Applicable)
- www.openwall.com/lists/oss-security/2026/05/06/8 (Mailing List, Release Notes)
Frequently asked questions
- What is CVE-2026-44601?
- CVE-2026-44601 is a low-severity vulnerability in Torproject Tor, classified under CWE-837. CVSS score: 3.7/10. Published 2026-05-07.
- How severe is CVE-2026-44601?
- Low severity. CVSS v3 base score is 3.7 out of 10.