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High, CVSS 8.3amended

sanic vulnerable to Path Traversal when using app.static if using encoded %2F URLs

CVE-2022-35920GHSA-8cw9-5hmv-77w6

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (sanic 22.6.1, 21.12.2, 20.12.7), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • PyPI sanic

    Affected
    >= 22.0.0, < 22.6.1>= 21.0.0, < 21.12.2< 20.12.7
    Fixed in
    20.12.7, 21.12.2, 22.6.1

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
8.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
EPSS
  • CVE-2022-35920: 1.20% estimated exploitation activity in the next 30 days; percentile 68.19 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact Access to lateral directories when using app.static if using encoded %2F URLs. Parent directory traversal is not impacted. Patches - v20.12.7 (LTS) - v21.12.2 (LTS) - v22.6.1 References https://github.com/sanic-org/sanic/issues/2478 https://github.com/sanic-org/sanic/pull/2495 For more information If you have any questions or comments about this advisory: Open an issue in the community forums Ping us on the Discord server

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-8cw9-5hmv-77w6

  2. Revision 1 · created ·

    Published from osv record GHSA-8cw9-5hmv-77w6

Agent brief

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# Patch Next advisory brief: CVE-2022-35920

Advisory: sanic vulnerable to Path Traversal when using `app.static` if using encoded `%2F` URLs
IDs: CVE-2022-35920, GHSA-8cw9-5hmv-77w6
Record: https://patchnext.com/advisories/cve-2022-35920 (revision 2, source checked 26 Oct 2026, 13:11 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: sanic 22.6.1, 21.12.2, 20.12.7. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI sanic: affected >= 22.0.0, < 22.6.1; >= 21.0.0, < 21.12.2; < 20.12.7; fixed in 20.12.7, 21.12.2, 22.6.1

## Suggested inspection (read-only)
- `python -m pip show sanic`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on sanic.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-8cw9-5hmv-77w6 (OSV record GHSA-8cw9-5hmv-77w6 lists affected ranges: PyPI sanic >=22.0.0 =21.0.0 =0 <20.12.7 (fixed))
- Verified: https://github.com/advisories/GHSA-8cw9-5hmv-77w6 (GitHub-reviewed advisory GHSA-8cw9-5hmv-77w6 lists affected ranges: PyPI sanic >=22.0.0 =21.0.0 =0 <20.12.7)

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