CVE-2022-35920 Improper Limitation of a Pathname to a Restricted Directory in sanic
Attackers can access lateral directories via encoded URLs in Sanic's static file serving, potentially exposing sensitive files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-35920?
CVE-2022-35920 is a high-severity path traversal vulnerability in sanic-org sanic, published on 1 Aug 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Sanic is an opensource python web server/framework. Affected versions of sanic allow access to lateral directories when using `app.static` if using encoded `%2F` URLs. Parent directory traversal is not impacted. Users are advised to upgrade. There is no known workaround for this issue.
Weakness: CWE-22
Which versions are affected by CVE-2022-35920?
7 open source packages ship an affected version, including sanic. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
sanic PyPI | All versions | 20.12.7, 22.6.1, 21.12.2 |
sanic PyPI | All versions | 20.12.7 |
sanic PyPI | All versions | 20.12.7 |
sanic PyPI | From 21.0.0 | 21.12.2 |
sanic PyPI | From 21.0.0 | 21.12.2 |
sanic PyPI | From 22.0.0 | 22.6.1 |
1 more packages
sanic PyPI | From 22.0.0 | 22.6.1 |
Products include Sanic Project Sanic.
How do I fix CVE-2022-35920?
Upgrade sanic to a fixed version for your release line: 20.12.7, 22.6.1 or 21.12.2.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2022-35920 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-35920 exists.
Other vulnerabilities in sanic-org sanic
Sources
Also known as GHSA-8cw9-5hmv-77w6, PYSEC-2026-918.