CVE-2020-7695

HTTP Response Splitting

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Published Jul 27, 2020 CVSS 3.1 · 5.3 Medium EPSS 1.4% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

uvicorn

affected

Version	Status	Constraints
`0`	affected	< unspecified

Configuration 1 [-]

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

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2020-0233	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.
Github GHSA	GHSA-f97h-2pfx-f59f	HTTP response splitting in uvicorn

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: 1.4% (1.386% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/encode/uvicorn
https://snyk.io/vuln/SNYK-PYTHON-UVICORN-570471

History

No history.

Subscriptions

Encode Uvicorn

Weaknesses

CWE-74

Sources

CVE record Updated: Sep 17, 2024, 12:06 AM

Status: PUBLISHED
Assigner: snyk
Published: Jul 27, 2020, 11:25 AM
Updated: Sep 17, 2024, 12:06 AM
Reserved: Jan 21, 2020, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:25 AM

Status: Modified
Published: Jul 27, 2020, 12:15 PM
Modified: Jun 17, 2026, 3:25 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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