CVE-2020-35899: actix actix-service Use After Free
CVSS: 5.5v3.1MediumModified
AliasesGHSA-whc7-5p35-4ww2RUSTSEC-2020-0046
Published 31-12-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-35899 is a medium (CVSS 5.5) Use After Free vulnerability in actix actix-service. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.38%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 31-12-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in the actix-service crate before 1.0.6 for Rust. The Cell implementation allows obtaining more than one mutable reference to the same data.
CVSS metrics
3 scores · 2 sources · 2 versionsMedium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- OSV · Crates.ioEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Low 2.1Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
0.38%
Chance of exploitation in the next 30 days
Percentile
31%
Versus all other CVEs
30-day change
+0.01 pp
From 0.37% on 22-09-2026
22-09-202622-10-2026
EPSS score0.38%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (rustsec.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Actix1 product
- actix-service< 1.0.6
Crates.Io1 product
- actix-service< 1.0.6 | ≥ 0.0.0-0, < 1.0.6
2 vendors · 2 products
References
6 links
- github.com/actix/actix-netPACKAGE