What is CVE-2026-44599?

CVE-2026-44599 is a low-severity vulnerability in Torproject Tor, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 3.7/10. Published 2026-05-07.

How severe is CVE-2026-44599?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Torproject Tor

CVE-2026-44599

Tor before 0.4.9.7 can attempt or accept BEGIN_DIR via conflux legs, aka TROVE-2026-008.

EPSS: 0.000 (1.9th percentile) — read the EPSS interpretation.

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:L/A:N.

Affected products

Torproject Tor — versions 0

Weakness classification (CWE)

CWE-669 — Incorrect Resource Transfer Between Spheres

References

cve@mitre.org (Release Notes)
cve@mitre.org (Mailing List, Third Party Advisory)
cve@mitre.org (Broken Link)
cve@mitre.org (Patch)

Frequently asked questions

What is CVE-2026-44599?: CVE-2026-44599 is a low-severity vulnerability in Torproject Tor, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 3.7/10. Published 2026-05-07.
How severe is CVE-2026-44599?: Low severity. CVSS v3 base score is 3.7 out of 10.