CVE-2026-44601: torproject tor
CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-44601DEBIAN-CVE-2026-44601
Published 07-05-2026Last modified 07-05-2026
Vulnerability summary
CVE-2026-44601 is a high (CVSS 7.5) vulnerability in torproject tor. EPSS estimates a 0.60% chance of exploitation in the next 30 days, higher than 47.7% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
0.60%
0%100%
Low · +0.26 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 2 · Related 1Timeline
- 07-05-2026PublishedVulnerability first disclosed.
- 07-05-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 4 sources · 1 versionHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSources4 sources · 3.7–7.5
- CVE.orgCNA3.7LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.60%
Chance of exploitation in the next 30 days
Percentile
48%
Versus all other CVEs
30-day change
+0.26 pp
From 0.34% on 19-09-2026
19-09-202619-10-2026
EPSS score0.60%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- tor< 0.4.9.8-0+deb12u1 | < 0.4.9.8-0+deb13u1 | < 0.4.9.8-1
Torproject1 product
- tor< 0.4.9.7
Ubuntu1 product
- torAll versions (No fix recorded)
3 vendors · 3 products
