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

CVE-2026-44603

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

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

LOW · CVSS 3.7 EPSS 0.00057
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-193Off-by-one Error
▤

Affected Products & Versions

1
torproject tor< 0.4.9.7
▣

Scoring & Timeline

3.7
LOW · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 May 2026 · 04:16 AM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
suse-csafopenSUSE-SU-2026:20709-1
suse-csafopenSUSE-SU-2026:10735-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://forum.torproject.org/c/news/tor-release-announcement/28Release Notes
https://gitlab.torproject.org/tpo/core/tor/-/commit/1703df3d439c83c2184e259fad1cfa19240f9c89Patch
https://gitlab.torproject.org/tpo/core/tor/-/work_items/41245Broken Link
https://www.openwall.com/lists/oss-security/2026/05/06/8Mailing ListThird Party Advisory
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