CVE-2020-36435
Data race in ruspiro-singleton
An issue was discovered in the ruspiro-singleton crate before 0.4.1 for Rust. In Singleton, Send and Sync do not have bounds checks.
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 ruspiro-singleton crate before 0.4.1 for Rust. In Singleton, Send and Sync do not have bounds checks.
- Record
CVE-2020-36435- 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-362
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the ruspiro-singleton crate before 0.4.1 for Rust. In Singleton, Send and Sync do not have bounds checks.
- Record
CVE-2020-36435- Updated
- 2026-11-02
EUVDEUVD-2021-1707 No score
An issue was discovered in the ruspiro-singleton crate before 0.4.1 for Rust. In Singleton, Send and Sync do not have bounds checks.
- Record
EUVD-2021-1707- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fqq2-xp7m-xvm8
Data race in ruspiro-singleton
Singleton<T> is meant to be a static object that can be initialized lazily. In
order to satisfy the requirement that static items must implement Sync,
Singleton implemented both Sync and Send unconditionally.
This allows for a bug where non-Sync types such as Cell can be used in
singletons and cause data races in concurrent programs.
The flaw was corrected in commit b0d2bd20e by adding trait bounds, requiring
the contaiend type to implement Sync.
- Record
GHSA-fqq2-xp7m-xvm8- 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-119, CWE-362
- Updated
- 2026-11-02
OSVGHSA-fqq2-xp7m-xvm8
Data race in ruspiro-singleton
Singleton<T> is meant to be a static object that can be initialized lazily. In
order to satisfy the requirement that static items must implement Sync,
Singleton implemented both Sync and Send unconditionally.
This allows for a bug where non-Sync types such as Cell can be used in
singletons and cause data races in concurrent programs.
The flaw was corrected in commit b0d2bd20e by adding trait bounds, requiring
the contaiend type to implement Sync.
- Record
GHSA-fqq2-xp7m-xvm8- 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-119, CWE-362
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0115
Singleton lacks bounds on Send and Sync.
Singleton<T> is meant to be a static object that can be initialized lazily. In
order to satisfy the requirement that static items must implement Sync,
Singleton implemented both Sync and Send unconditionally.
This allows for a bug where non-Sync types such as Cell can be used in
singletons and cause data races in concurrent programs.
The flaw was corrected in commit b0d2bd20e by adding trait bounds, requiring
the contaiend type to implement Sync.
- Record
RUSTSEC-2020-0115- 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
| Package | Affected | Fixed |
|---|---|---|
ruspiro-singletoncrates.io |
before 0.4.1 | 0.4.1 |
ruspiro-singletoncrates.io |
0.0.0-0 up to 0.4.1 | 0.4.1 |
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-2020-36435 is a high vulnerability (CVSS 8.1) in Ruspiro-singleton Project Ruspiro-singleton, published November 16, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.77%, the 55th percentile. Fixed in ruspiro-singleton 0.4.1.
References
rustsec.org/advisories/RUSTSEC-2020-0115.html
raw.githubusercontent.com/rustsec/advisory-db/main/crates/ruspiro-singleton/RUSTSEC-2020-0115.md
nvd.nist.gov/vuln/detail/CVE-2020-36435
github.com/RusPiRo/ruspiro-singleton/pull/11
crates.io/crates/ruspiro-singleton