How severe is CVE-2020-36215?

CVE-2020-36215 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-36215 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36215?

CVE-2020-36215 affects Hashconsing Project Hashconsing. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36215?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-36215 published?

CVE-2020-36215 was published on 2021-01-26 and last updated on 2026-06-17.

CVE-2020-36215

CVE-2020-36215 is a high-severity vulnerability in Hashconsing Project Hashconsing with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-662.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-662
Affected product: Hashconsing Project Hashconsing
Published: 2021-01-26
Last modified: 2026-06-17

Description

An issue was discovered in the hashconsing crate before 1.1.0 for Rust. Because HConsed does not have bounds on its Send trait or Sync trait, memory corruption can occur.

Frequently asked questions

What is CVE-2020-36215?: An issue was discovered in the hashconsing crate before 1.1.0 for Rust. Because HConsed does not have bounds on its Send trait or Sync trait, memory corruption can occur.
How severe is CVE-2020-36215?: CVE-2020-36215 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-36215 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36215?: CVE-2020-36215 affects Hashconsing Project Hashconsing. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36215?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-36215 published?: CVE-2020-36215 was published on 2021-01-26 and last updated on 2026-06-17.

References

https://rustsec.org/advisories/RUSTSEC-2020-0107.html

Affected products (1)

cpe:2.3:a:hashconsing_project:hashconsing:*:*:*:*:*:rust:*:*

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