What is CVE-2020-36458?

An issue was discovered in the lexer crate through 2020-11-10 for Rust. For ReaderResult , there is an implementation of Sync with a trait bound of T: Send, E: Send.

How severe is CVE-2020-36458?

CVE-2020-36458 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-36458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36458?

CVE-2020-36458 affects Lexer Project Lexer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36458?

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-2020-36458 published?

CVE-2020-36458 was published on 2021-08-08 and last updated on 2026-06-17.

CVE-2020-36458

CVE-2020-36458 is a high-severity vulnerability in Lexer Project Lexer with a CVSS 3.x base score of 8.1. 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-362.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Lexer Project Lexer
Published: 2021-08-08
Last modified: 2026-06-17

Description

An issue was discovered in the lexer crate through 2020-11-10 for Rust. For ReaderResult<T, E>, there is an implementation of Sync with a trait bound of T: Send, E: Send.

Frequently asked questions

What is CVE-2020-36458?: An issue was discovered in the lexer crate through 2020-11-10 for Rust. For ReaderResult<T, E>, there is an implementation of Sync with a trait bound of T: Send, E: Send.
How severe is CVE-2020-36458?: CVE-2020-36458 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-36458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36458?: CVE-2020-36458 affects Lexer Project Lexer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36458?: 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-2020-36458 published?: CVE-2020-36458 was published on 2021-08-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lexer_project:lexer:*:*:*:*:*:rust:*:*

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