CVE-2020-36456
Data races in toolshed
An issue was discovered in the toolshed crate through 2020-11-15 for Rust. In CopyCell<T>, the Send trait lacks bounds on the contained type.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in the toolshed crate through 2020-11-15 for Rust. In CopyCell<T>, the Send trait lacks bounds on the contained type.
- Record
CVE-2020-36456- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-77
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the toolshed crate through 2020-11-15 for Rust. In CopyCell<T>, the Send trait lacks bounds on the contained type.
- Record
CVE-2020-36456- Updated
- 2026-11-02
EUVDEUVD-2021-1516 No score
An issue was discovered in the toolshed crate through 2020-11-15 for Rust. In CopyCell<T>, the Send trait lacks bounds on the contained type.
- Record
EUVD-2021-1516- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-2r6q-6c8c-g762
Data races in toolshed
An issue was discovered in the toolshed crate through 2020-11-15 for Rust. In CopyCell<T>, the Send trait lacks bounds on the contained type.
- Record
GHSA-2r6q-6c8c-g762- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-77, CWE-362
- Updated
- 2026-11-02
OSVGHSA-2r6q-6c8c-g762
Data races in toolshed
An issue was discovered in the toolshed crate through 2020-11-15 for Rust. In CopyCell<T>, the Send trait lacks bounds on the contained type.
- Record
GHSA-2r6q-6c8c-g762- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-362, CWE-77
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0136
CopyCell lacks bounds on its Send trait allowing for data races
CopyCell<T> is a Cell-like type that is implemented for any type T that
is Copyable. It's Send trait has no bounds on the contained type.
As not all Copyable types are thread safe, for example non-mutable references
implement the Copy trait, it is possible to send references to types with
interior mutability such as Cell across threads and cause data races.
- Record
RUSTSEC-2020-0136- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-36456 is a high vulnerability (CVSS 8.1) in Toolshed Project Toolshed, published November 15, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.10%, the 66th percentile. No source names a fixed version.
References
rustsec.org/advisories/RUSTSEC-2020-0136.html
raw.githubusercontent.com/rustsec/advisory-db/main/crates/toolshed/RUSTSEC-2020-0136.md
nvd.nist.gov/vuln/detail/CVE-2020-36456
github.com/ratel-rust/toolshed/issues/12
crates.io/crates/toolshed