How severe is CVE-2019-25009?

CVE-2019-25009 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-25009 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-25009?

CVE-2019-25009 affects Hyper Http. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-25009?

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

When was CVE-2019-25009 published?

CVE-2019-25009 was published on 2020-12-31 and last updated on 2026-06-17.

CVE-2019-25009

CVE-2019-25009 is a critical-severity vulnerability in Hyper Http with a CVSS 3.x base score of 9.8. 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-415.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-415
Affected product: Hyper Http
Published: 2020-12-31
Last modified: 2026-06-17

Description

An issue was discovered in the http crate before 0.1.20 for Rust. The HeaderMap::Drain API can use a raw pointer, defeating soundness.

Frequently asked questions

What is CVE-2019-25009?: An issue was discovered in the http crate before 0.1.20 for Rust. The HeaderMap::Drain API can use a raw pointer, defeating soundness.
How severe is CVE-2019-25009?: CVE-2019-25009 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-25009 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-25009?: CVE-2019-25009 affects Hyper Http. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-25009?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-25009 published?: CVE-2019-25009 was published on 2020-12-31 and last updated on 2026-06-17.

References

https://rustsec.org/advisories/RUSTSEC-2019-0034.html

Affected products (1)

cpe:2.3:a:hyper:http:*:*:*:*:*:rust:*:*

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