What’s Vulnerable › Vulnerabilities

CVE-2020-35711

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-25 · updated 2026-06-17

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.

Affected products

• Arc-Swap Project Arc-Swap: before 0.4.8; from 1.0.0 before 1.1.0 — fixed in 0.4.8, 1.1.0

How to fix

Upgrade to a fixed version: Arc-Swap Project Arc-Swap 0.4.8, 1.1.0. Check the vendor advisory for mitigations.

References

• https://github.com/vorner/arc-swap/issues/45
• https://rustsec.org/advisories/RUSTSEC-2020-0091.html
• https://github.com/vorner/arc-swap/issues/45
• https://rustsec.org/advisories/RUSTSEC-2020-0091.html

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