CVE-2020-36469
Data races in appendix
An issue was discovered in the appendix crate through 2020-11-15 for Rust. For the generic K and V type parameters, Send and Sync are implemented unconditionally.
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
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in the appendix crate through 2020-11-15 for Rust. For the generic K and V type parameters, Send and Sync are implemented unconditionally.
- Record
CVE-2020-36469- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
CVE List No score
An issue was discovered in the appendix crate through 2020-11-15 for Rust. For the generic K and V type parameters, Send and Sync are implemented unconditionally.
- Record
CVE-2020-36469- Updated
- 2026-11-02
EUVDEUVD-2021-1708 No score
An issue was discovered in the appendix crate through 2020-11-15 for Rust. For the generic K and V type parameters, Send and Sync are implemented unconditionally.
- Record
EUVD-2021-1708- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fvhr-7j8m-3cvc
Data races in appendix
The appendix crate implements a key-value mapping data structure called
Index<K, V> that is stored on disk. The crate allows for any type to inhabit
the generic K and V type parameters and implements Send and Sync for them
unconditionally.
Using a type that is not marked as Send or Sync with Index can allow it
to be used across multiple threads leading to data races. Additionally using
reference types for the keys or values will lead to the segmentation faults
in the crate's code.
- Record
GHSA-fvhr-7j8m-3cvc- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-362
- Updated
- 2026-11-02
OSVGHSA-fvhr-7j8m-3cvc
Data races in appendix
The appendix crate implements a key-value mapping data structure called
Index<K, V> that is stored on disk. The crate allows for any type to inhabit
the generic K and V type parameters and implements Send and Sync for them
unconditionally.
Using a type that is not marked as Send or Sync with Index can allow it
to be used across multiple threads leading to data races. Additionally using
reference types for the keys or values will lead to the segmentation faults
in the crate's code.
- Record
GHSA-fvhr-7j8m-3cvc- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-362
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0149
Data race and memory safety issue in `Index`
The appendix crate implements a key-value mapping data structure called
Index<K, V> that is stored on disk. The crate allows for any type to inhabit
the generic K and V type parameters and implements Send and Sync for them
unconditionally.
Using a type that is not marked as Send or Sync with Index can allow it
to be used across multiple threads leading to data races. Additionally using
reference types for the keys or values will lead to the segmentation faults
in the crate's code.
- Record
RUSTSEC-2020-0149- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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-2020-36469 is a medium vulnerability (CVSS 5.9) in Appendix Project Appendix, published November 15, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.98%, the 62nd percentile. No source names a fixed version.