Vulnerability in Torproject Tor

CVE-2026-44597

Tor before 0.4.9.7 has an out-of-bounds read when an END, a TRUNCATE, or a TRUNCATED cell lacks a reason in its payload, aka TROVE-2026-011.

EPSS: 0.000 (7.0th 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:N/A:L.

Affected products

Torproject Tor — versions 0

Weakness classification (CWE)

CWE-684

References

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

Frequently asked questions

What is CVE-2026-44597?: CVE-2026-44597 is a low-severity vulnerability in Torproject Tor, classified under CWE-684. CVSS score: 3.7/10. Published 2026-05-07.
How severe is CVE-2026-44597?: Low severity. CVSS v3 base score is 3.7 out of 10.