CVE-2020-35896 json
Insufficient size checks in ws
published 2020-09-25 6 y ago modified 2026-06-17 4 mo ago also GHSA-rh7x-ppxx-p34c , RUSTSEC-2020-0043 , EUVD-2021-1868
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
An issue was discovered in the ws crate through 2020-09-25 for Rust. The outgoing buffer is not properly limited, leading to a remote memory-consumption attack.
Exploit prediction
1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | ws | <=0.9.1 >=0.0.0-0 |
no fix listed |
Classification
References
-
rustsec.org
/advisories/RUSTSEC-2020-0043.html
web, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-35896
advisory
-
github.com
/housleyjk/ws-rs/issues/291
web, report
-
github.com
/housleyjk/ws-rs
package
-
crates.io
/crates/ws
package
Sources
- CVE List CVE-2020-35896
- GitHub Advisory GHSA-rh7x-ppxx-p34c
- NVD CVE-2020-35896
- OSV RUSTSEC-2020-0043
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