CVE catalog

CVE-2020-7694

python-uvicorn: CVE-2020-7694

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published: Jul 10, 2020, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.36% · Oct 25, 2026

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).

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	python-uvicorn	sid	`0.53.0-1`	fixed
Debian	python-uvicorn	forky	`0.53.0-1`	fixed
Debian	python-uvicorn	trixie	`0.32.0-3`	fixed
Debian	python-uvicorn	bookworm	`0.17.6-1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	python-uvicorn	source	sid	`0.13.3-1`	not yet assigned	Not reported	[969276]
Debian	python-uvicorn	source	forky	`0.13.3-1`	not yet assigned	Not reported	[969276]
Debian	python-uvicorn	source	trixie	`0.13.3-1`	not yet assigned	Not reported	[969276]
Debian	python-uvicorn	source	bookworm	`0.13.3-1`	not yet assigned	Not reported	[969276]

[Debian bug #969276]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[python3-uvicorn]Fixed
Source package: [python-uvicorn]
Details (2)
- 0.17.6-1 · all · bookworm
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · bookworm; dsa · python-uvicorn · debian · 12
- 0.17.6-1 · all · bookworm
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · bookworm; dsa · python-uvicorn · debian · 12
[python-uvicorn-doc]Fixed
Source package: [python-uvicorn]
Details (2)
- 0.17.6-1 · all · bookworm
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · bookworm; dsa · python-uvicorn · debian · 12
- 0.17.6-1 · all · bookworm
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · bookworm; dsa · python-uvicorn · debian · 12
[uvicorn]Fixed
Source package: [python-uvicorn]
Details (2)
- 0.17.6-1 · all · bookworm
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · bookworm; dsa · python-uvicorn · debian · 12
- 0.17.6-1 · all · bookworm
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · bookworm; dsa · python-uvicorn · debian · 12

[Debian 13 (Trixie)]

[python3-uvicorn]Fixed
Source package: [python-uvicorn]
Details (2)
- 0.32.0-3 · all · trixie
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · 13
- 0.32.0-3 · all · trixie
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · 13
[python-uvicorn-doc]Fixed
Source package: [python-uvicorn]
Details (2)
- 0.32.0-3 · all · trixie
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · 13
- 0.32.0-3 · all · trixie
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · 13
[uvicorn]Fixed
Source package: [python-uvicorn]
Details (2)
- 0.32.0-3 · all · trixie
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · 13
- 0.32.0-3 · all · trixie
  Fixed · Fixed: 0.13.3-1
  dsa · python-uvicorn · debian · 13

Observed: Oct 23, 2026, 5:53:17 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]