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
Published May 7, 2026
9.1
CRITICALCVSS 3.1
EPSS 0.63%
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.
Affected products
-
- Version 0StatusaffectedConstraints<0.4.9.7
- Version
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 |
|
- < 0.4.9.7
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
1 other source (MITRE) ▾
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed May 7, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.
Score over time
May-Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 4, 2026 | 0.63% (0.00630) | 48.39th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.45% (0.00450) | 35.58th | v5 (v2026.06.15) |
| May 7, 2026 | 0.01% (0.00010) | 1.24th | v4 (v2025.03.14) |
References (4)
- https://forum.torproject.org/c/news/tor-release-announcement/28 Release Notes
- https://gitlab.torproject.org/tpo/core/tor/-/commit/8f98054b1982d00a14639864d03e9afd90b87481 Patch
- https://gitlab.torproject.org/tpo/core/tor/-/work_items/41254 Broken Link
- https://www.openwall.com/lists/oss-security/2026/05/06/8 Mailing ListThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://forum.torproject.org/c/news/tor-release-announcement/28 | Release Notes | |
| https://gitlab.torproject.org/tpo/core/tor/-/commit/8f98054b1982d00a14639864d03e9afd90b87481 | Patch | |
| https://gitlab.torproject.org/tpo/core/tor/-/work_items/41254 | Broken Link | |
| https://www.openwall.com/lists/oss-security/2026/05/06/8 | Mailing ListThird Party Advisory |
Change history (0)
No recorded changes yet.