CVE-2026-44603: CWE-193 Off-by-one Error in torproject Tor
CVE-2026-44603 is an off-by-one error vulnerability in Tor versions before 0.4.9.7. It involves an out-of-bounds read by one byte triggered by a malformed BEGIN cell. The vulnerability is classified as CWE-193 and has a low severity with a CVSS score of 3.7. There are no known exploits in the wild, and no official patch or remediation level has been confirmed yet.
AI Analysis
Technical Summary
This vulnerability in the Tor software arises from an off-by-one error causing an out-of-bounds read of one byte when processing a malformed BEGIN cell. It affects versions prior to 0.4.9.7. The issue is identified as CWE-193 and has a low CVSS score of 3.7, indicating limited impact. No vendor advisory or patch information is currently available, and no known exploitation has been reported.
Potential Impact
The impact is limited to a low-severity out-of-bounds read, which does not affect confidentiality, integrity, or availability according to the CVSS vector. There are no known exploits in the wild, suggesting minimal immediate risk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should monitor vendor communications for updates. No specific mitigation actions are currently documented.
CVE-2026-44603: CWE-193 Off-by-one Error in torproject Tor
Description
CVE-2026-44603 is an off-by-one error vulnerability in Tor versions before 0.4.9.7. It involves an out-of-bounds read by one byte triggered by a malformed BEGIN cell. The vulnerability is classified as CWE-193 and has a low severity with a CVSS score of 3.7. There are no known exploits in the wild, and no official patch or remediation level has been confirmed yet.
CVSS v3.1
Score 3.7low
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in the Tor software arises from an off-by-one error causing an out-of-bounds read of one byte when processing a malformed BEGIN cell. It affects versions prior to 0.4.9.7. The issue is identified as CWE-193 and has a low CVSS score of 3.7, indicating limited impact. No vendor advisory or patch information is currently available, and no known exploitation has been reported.
Potential Impact
The impact is limited to a low-severity out-of-bounds read, which does not affect confidentiality, integrity, or availability according to the CVSS vector. There are no known exploits in the wild, suggesting minimal immediate risk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should monitor vendor communications for updates. No specific mitigation actions are currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-05-07T03:21:24.363Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fc1394cbff5d8610732771
Added to database: 05/07/2026, 04:22:44 UTC
Last enriched: 05/14/2026, 10:48:55 UTC
Last updated: 06/24/2026, 02:09:07 UTC
Views: 103
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