CVE-2026-44603
Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in Tor Network Client

Publication date: 2026-05-07

Last updated on: 2026-05-07

Assigner: MITRE

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.

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Meta Information

Published
2026-05-07
Last Modified
2026-05-07
Generated
2026-07-07
AI Q&A
2026-05-07
EPSS Evaluated
2026-07-05
NVD
CVE-2026-44603
EUVD
EUVD-2026-28306

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
torproject tor to 0.4.9.7 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-193 A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

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Executive Summary

CVE-2026-44603 is an out-of-bounds read vulnerability in Tor versions before 0.4.9.7. It occurs due to a malformed BEGIN cell, which causes the software to read one byte beyond the intended memory boundary.

Impact Analysis

This vulnerability can lead to crashes or memory corruption in the Tor software. While it does not directly impact confidentiality or integrity, it may cause denial of service or potentially be exploited for security bypasses.

Mitigation Strategies

The Tor Project strongly recommends upgrading to Tor version 0.4.9.7 immediately to fix this vulnerability.

Compliance Impact

There is no information provided in the available context or resources about how CVE-2026-44603 affects compliance with common standards and regulations such as GDPR or HIPAA.

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