How severe is CVE-2020-7658?

CVE-2020-7658 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-7658 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-7658?

CVE-2020-7658 affects Meinheld. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-7658?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-7658 published?

CVE-2020-7658 was published on 2020-05-22 and last updated on 2026-06-17.

CVE-2020-7658

CVE-2020-7658 is a medium-severity vulnerability in Meinheld with a CVSS 3.x base score of 6.1. 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-444.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-444
Affected product: Meinheld
Published: 2020-05-22
Last modified: 2026-06-17

Description

meinheld prior to 1.0.2 is vulnerable to HTTP Request Smuggling. HTTP pipelining issues and request smuggling attacks might be possible due to incorrect Content-Length and Transfer encoding header parsing.

Frequently asked questions

What is CVE-2020-7658?: meinheld prior to 1.0.2 is vulnerable to HTTP Request Smuggling. HTTP pipelining issues and request smuggling attacks might be possible due to incorrect Content-Length and Transfer encoding header parsing.
How severe is CVE-2020-7658?: CVE-2020-7658 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-7658 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-7658?: CVE-2020-7658 affects Meinheld. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-7658?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-7658 published?: CVE-2020-7658 was published on 2020-05-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:meinheld:meinheld:*:*:*:*:*:*:*:*

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