Tor before 0.4.9.7 has an out-of-bounds read when an END, a TRUNCATE, or a TRUNCATED cell lacks a reason in its payload, aka TROVE-2026-011.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
torproject Tor unaffected
Version Status Constraints
0 affected < 0.4.9.7

No data.

No data.

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Vendors Products
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Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://forum.torproject.org/c/news/tor-release-announcement/28 cve-icon cve-icon
https://gitlab.torproject.org/tpo/core/tor/-/commit/8f98054b1982d00a14639864d03e9afd90b87481 cve-icon cve-icon
https://gitlab.torproject.org/tpo/core/tor/-/work_items/41254 cve-icon cve-icon
https://www.openwall.com/lists/oss-security/2026/05/06/8 cve-icon cve-icon
History

Thu, 07 May 2026 05:45:00 +0000

Type Values Removed Values Added
Title Out-of-bounds Read in Tor Relay Cell Handling for END, TRUNCATE Cells Without Reason

Thu, 07 May 2026 02:00:00 +0000

Type Values Removed Values Added
First Time appeared Torproject
Torproject tor
CPEs cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
Vendors & Products Torproject
Torproject tor
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'}

Thu, 07 May 2026 01:15:00 +0000

Type Values Removed Values Added
Description Tor before 0.4.9.7 has an out-of-bounds read when an END, a TRUNCATE, or a TRUNCATED cell lacks a reason in its payload, aka TROVE-2026-011.
Weaknesses CWE-684
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-07T03:24:05.985Z

Reserved: 2026-05-07T00:56:46.891Z

Link: CVE-2026-44597

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-07T01:16:01.163

Modified: 2026-05-07T02:16:04.637

Link: CVE-2026-44597

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-07T05:30:22Z

Weaknesses