CVE-2026-44603

Out-of-Bounds Read in Tor via Malformed BEGIN Cell

Published May 7, 2026 CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6260-1 tor security update
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Out-of-Bounds Read in Tor via Malformed BEGIN Cell
Type Values Removed Values 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.
First Time appeared Torproject
Torproject tor
Weaknesses CWE-193
CPEs cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
Vendors & Products Torproject
Torproject tor
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
May 7, 2026, 2:58 PM
Reserved
May 7, 2026, 3:21 AM
Status
Analyzed
Published
May 7, 2026, 4:16 AM
Modified
Oct 26, 2026, 9:10 PM