CVE-2020-35711

Name: CVE-2020-35711
Creator: NVD / NIST
Published: 2020-12-25T23:15:12.86+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.60%

Last modified Jun 17, 2026

CVE-2020-35711 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue has been discovered in the arc-swap crate before 0.4.8 (and 1.x before 1.1.0) for Rust. Use of arc_swap::access::Map with the Constant test helper (or with a user-supplied implementation of the Access trait) could sometimes lead to dangling references being returned by the map.. EPSS estimates a 1.60% chance of exploitation in the next 30 days.

Description

An issue has been discovered in the arc-swap crate before 0.4.8 (and 1.x before 1.1.0) for Rust. Use of arc_swap::access::Map with the Constant test helper (or with a user-supplied implementation of the Access trait) could sometimes lead to dangling references being returned by the map.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.60%

72.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Arc-Swap Project	Arc-Swap	< 0.4.8
Arc-Swap Project	Arc-Swap	>= 1.0.0, < 1.1.0

References

https://github.com/vorner/arc-swap/issues/45Exploit, Patch, Third Party Advisory
https://rustsec.org/advisories/RUSTSEC-2020-0091.htmlThird Party Advisory
https://github.com/vorner/arc-swap/issues/45Exploit, Patch, Third Party Advisory
https://rustsec.org/advisories/RUSTSEC-2020-0091.htmlThird Party Advisory

Timeline

Published: Dec 25, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35711?

How severe is CVE-2020-35711?

CVE-2020-35711 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.60% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35711?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-35711?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST