CVE-2020-35901
Use-after-free in actix-http
An issue was discovered in the actix-http crate before 2.0.0-alpha.1 for Rust. There is a use-after-free in BodyStream.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- 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 actix-http crate before 2.0.0-alpha.1 for Rust. There is a use-after-free in BodyStream.
- Record
CVE-2020-35901- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-416
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the actix-http crate before 2.0.0-alpha.1 for Rust. There is a use-after-free in BodyStream.
- Record
CVE-2020-35901- Updated
- 2026-11-02
EUVDEUVD-2021-1881 No score
An issue was discovered in the actix-http crate before 2.0.0-alpha.1 for Rust. There is a use-after-free in BodyStream.
- Record
EUVD-2021-1881- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v3j6-xf77-8r9c
Use-after-free in actix-http
An issue was discovered in the actix-http crate before 2.0.0-alpha.1 for Rust. There is a use-after-free in BodyStream.
- Record
GHSA-v3j6-xf77-8r9c- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
OSV
An issue was discovered in the actix-http crate before 2.0.0-alpha.1 for Rust. There is a use-after-free in BodyStream.
- Record
CVE-2020-35901- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-v3j6-xf77-8r9c
Use-after-free in actix-http
An issue was discovered in the actix-http crate before 2.0.0-alpha.1 for Rust. There is a use-after-free in BodyStream.
- Record
GHSA-v3j6-xf77-8r9c- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0048
Use-after-free in BodyStream due to lack of pinning
Affected versions of this crate did not require the buffer wrapped in BodyStream to be pinned,
but treated it as if it had a fixed location in memory. This may result in a use-after-free.
The flaw was corrected by making the trait MessageBody require Unpin
and making poll_next() function accept Pin<&mut Self> instead of &mut self.
- Record
RUSTSEC-2020-0048- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
actix-httpcrates.io |
before 2.0.0 | 2.0.0 |
actix-httpcrates.io |
0.0.0-0 up to 2.0.0-alpha.1 | 2.0.0-alpha.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| 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-2020-35901 is a high vulnerability (CVSS 7.5) in Actix Actix-http, published January 24, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.42%, the 72nd percentile. Fixed in actix-http 2.0.0.