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CVE-2026-44603

32
FAUCET Score

Tor before 0.4.9.7 has an out-of-bounds read by one byte via a malformed BEGIN cell, aka TROVE-2026-007.

First published: May 7, 2026Last modified: May 7, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, < 0.4.9.7CPE match
cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
< 0.4.9.7CPE matchmatch criteria
cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.7LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.34%
Probability of exploitation in next 30 days
EPSS Percentile
26.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0034 is in the 5th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

forum.torproject.org / c/news/tor-release-announcement/28
Release Notes
gitlab.torproject.org / tpo/core/tor/-/commit/1703df3d439c83c2184e259fad1cfa19240f9c89
Patch
gitlab.torproject.org / tpo/core/tor/-/work_items/41245
Broken Link
openwall.com / lists/oss-security/2026/05/06/8
Mailing ListThird Party Advisory