CVE-2026-44603
Tor Tor Out-of-Bounds Read Vulnerability
Description
Tor before 0.4.9.7 has an out-of-bounds read by one byte via a malformed BEGIN cell, aka TROVE-2026-007.
INFO
Published Date :
May 7, 2026, 4:16 a.m.
Last Modified :
May 7, 2026, 5:24 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Tor to version 0.4.9.7 or later.
- Apply any available security patches immediately.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44603.
| URL | Resource |
|---|---|
| https://forum.torproject.org/c/news/tor-release-announcement/28 | Release Notes |
| https://gitlab.torproject.org/tpo/core/tor/-/commit/1703df3d439c83c2184e259fad1cfa19240f9c89 | Patch |
| https://gitlab.torproject.org/tpo/core/tor/-/work_items/41245 | Broken Link |
| https://www.openwall.com/lists/oss-security/2026/05/06/8 | Mailing List Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44603 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44603
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44603 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44603 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 07, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:* versions up to (excluding) 0.4.9.7 Added Reference Type MITRE: https://forum.torproject.org/c/news/tor-release-announcement/28 Types: Release Notes Added Reference Type MITRE: https://gitlab.torproject.org/tpo/core/tor/-/commit/1703df3d439c83c2184e259fad1cfa19240f9c89 Types: Patch Added Reference Type MITRE: https://gitlab.torproject.org/tpo/core/tor/-/work_items/41245 Types: Broken Link Added Reference Type MITRE: https://www.openwall.com/lists/oss-security/2026/05/06/8 Types: Mailing List, Third Party Advisory -
New CVE Received by [email protected]
May. 07, 2026
Action Type Old Value New Value Added Description Tor before 0.4.9.7 has an out-of-bounds read by one byte via a malformed BEGIN cell, aka TROVE-2026-007. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-193 Added Reference https://forum.torproject.org/c/news/tor-release-announcement/28 Added Reference https://gitlab.torproject.org/tpo/core/tor/-/commit/1703df3d439c83c2184e259fad1cfa19240f9c89 Added Reference https://gitlab.torproject.org/tpo/core/tor/-/work_items/41245 Added Reference https://www.openwall.com/lists/oss-security/2026/05/06/8