How severe is CVE-2020-7695?

CVE-2020-7695 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2020-7695 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-7695?

CVE-2020-7695 affects Encode Uvicorn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-7695?

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

When was CVE-2020-7695 published?

CVE-2020-7695 was published on 2020-07-27 and last updated on 2026-06-17.

CVE-2020-7695

CVE-2020-7695 is a medium-severity vulnerability in Encode Uvicorn with a CVSS 3.x base score of 5.3. 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-74.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Encode Uvicorn
Published: 2020-07-27
Last modified: 2026-06-17

Description

Uvicorn before 0.11.7 is vulnerable to HTTP response splitting. CRLF sequences are not escaped in the value of HTTP headers. Attackers can exploit this to add arbitrary headers to HTTP responses, or even return an arbitrary response body, whenever crafted input is used to construct HTTP headers.

Frequently asked questions

What is CVE-2020-7695?: Uvicorn before 0.11.7 is vulnerable to HTTP response splitting. CRLF sequences are not escaped in the value of HTTP headers. Attackers can exploit this to add arbitrary headers to HTTP responses, or even return an arbitrary response body, whenever crafted input is used to construct HTTP headers.
How severe is CVE-2020-7695?: CVE-2020-7695 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2020-7695 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-7695?: CVE-2020-7695 affects Encode Uvicorn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-7695?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-7695 published?: CVE-2020-7695 was published on 2020-07-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:encode:uvicorn:*:*:*:*:*:*:*:*

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