What’s Vulnerable › Vulnerabilities

CVE-2022-35920: Improper Limitation of a Pathname to a Restricted Directory in sanic

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-08-01 · updated 2026-06-17
• Weakness: CWE-22

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.

Affected products

• sanic-org sanic: before 20.12.7; from 21.0.0 before 21.12.2; from 22.0.0 before 22.6.1 — fixed in 20.12.7, 21.12.2, 22.6.1

How to fix

Upgrade to a fixed version: sanic-org sanic 20.12.7, 21.12.2, 22.6.1. Check the vendor advisory for mitigations.

References

• https://github.com/sanic-org/sanic/issues/2478
• https://github.com/sanic-org/sanic/pull/2495
• https://github.com/sanic-org/sanic/security/advisories/GHSA-8cw9-5hmv-77w6
• https://github.com/sanic-org/sanic/issues/2478
• https://github.com/sanic-org/sanic/pull/2495
• https://github.com/sanic-org/sanic/security/advisories/GHSA-8cw9-5hmv-77w6

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