What is CVE-2020-7694?

CVE-2020-7694 is a high-severity code injection vulnerability in uvicorn (pip), affecting versions < 0.11.7. It is fixed in 0.11.7. Untrusted input is evaluated as executable code within the application's runtime environment.

How severe is CVE-2020-7694?

CVE-2020-7694 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of uvicorn are affected by CVE-2020-7694?

uvicorn (pip) versions < 0.11.7 is affected.

Is there a fix for CVE-2020-7694?

Yes. CVE-2020-7694 is fixed in 0.11.7. Upgrade to this version or later.

Is CVE-2020-7694 exploitable, and should I be worried?

Whether CVE-2020-7694 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2020-7694 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

CVE-2020-7694 in uvicorn

Q: How severe is CVE-2020-7694?

CVE-2020-7694 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of uvicorn are affected by CVE-2020-7694?

uvicorn (pip) versions < 0.11.7 is affected.

Q: Is there a fix for CVE-2020-7694?

Yes. CVE-2020-7694 is fixed in 0.11.7. Upgrade to this version or later.

Q: Is CVE-2020-7694 exploitable, and should I be worried?

Whether CVE-2020-7694 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2020-7694 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2020-7694?

Upgrade uvicorn to 0.11.7 or later.

Summary

Log injection in uvicorn

This affects all versions of package uvicorn. The request logger provided by the package is vulnerable to ASNI escape sequence injection. Whenever any HTTP request is received, the default behaviour of uvicorn is to log its details to either the console or a log file. When attackers request crafted URLs with percent-encoded escape sequences, the logging component will log the URL after it's been processed with urllib.parse.unquote, therefore converting any percent-encoded characters into their single-character equivalent, which can have special meaning in terminal emulators. By requesting URLs with crafted paths, attackers can: * Pollute uvicorn's access logs, therefore jeopardising the integrity of such files. * Use ANSI sequence codes to attempt to interact with the terminal emulator that's displaying the logs (either in real time or from a file).

Impact

Untrusted input is evaluated as executable code within the application's runtime environment. Typical impact: arbitrary code execution within the application's privilege context.

CVE-2020-7694 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (0.11.7); upgrading removes the vulnerable code path.

Affected versions

uvicorn (< 0.11.7)

Security releases

uvicorn → 0.11.7 (pip)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

Already deployed Kodem?

See it in your environment New to Kodem? Get a demo →

Remediation advice

Upgrade uvicorn to 0.11.7 or later to resolve this vulnerability.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2020-7694? CVE-2020-7694 is a high-severity code injection vulnerability in uvicorn (pip), affecting versions < 0.11.7. It is fixed in 0.11.7. Untrusted input is evaluated as executable code within the application's runtime environment.
How severe is CVE-2020-7694? CVE-2020-7694 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of uvicorn are affected by CVE-2020-7694? uvicorn (pip) versions < 0.11.7 is affected.
Is there a fix for CVE-2020-7694? Yes. CVE-2020-7694 is fixed in 0.11.7. Upgrade to this version or later.
Is CVE-2020-7694 exploitable, and should I be worried? Whether CVE-2020-7694 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2020-7694 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2020-7694? Upgrade uvicorn to 0.11.7 or later.

Other vulnerabilities in uvicorn

CVE-IDSeverityPackage summary

CVE-2020-7695Highuvicorn: HTTP response splitting in uvicorn