GHSA-wvhx-q427-fgh3

Source

https://github.com/advisories/GHSA-wvhx-q427-fgh3

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/05/GHSA-wvhx-q427-fgh3/GHSA-wvhx-q427-fgh3.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-wvhx-q427-fgh3

Aliases

Published

2024-05-06T14:33:32Z

Modified

2026-09-10T03:50:14Z

Summary

Arbitrary HTML present after sanitization because of unicode normalization

Details

Impact

If using keep_typographic_whitespace=False (which is the default), the sanitizer normalizes unicode to the NFKC form at the end. Some unicode characters normalize to chevrons; this allows specially crafted HTML to escape sanitization.

Patches

The problem has been fixed in 2.4.2.

Workarounds

Set keep_typographic_whitespace=True explicitly, or normalize to NFKC yourself earlier.

Database specific

{
    "cwe_ids":  [],
    "github_reviewed":  true,
    "github_reviewed_at":  "2024-05-06T14:33:32Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}

References

Affected packages

PyPI / html-sanitizer

Package

Name: html-sanitizer; View open source insights on deps.dev
Purl: pkg:pypi/html-sanitizer

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

2.4.2

Affected versions

1.*

1.0.0

1.1.0

1.1.1

1.1.2

1.1.3

1.1.4

1.2.0

1.2.1

1.3.0

1.4.0

1.5.0

1.6.0

1.6.1

1.6.2

1.6.3

1.6.4

1.7.0

1.7.1

1.7.2

1.7.3

1.8.0

1.9.0

1.9.1

1.9.2

1.9.3

2.*

2.0.0

2.1.0

2.2.0

2.3.0

2.3.1

2.4.0

2.4.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/05/GHSA-wvhx-q427-fgh3/GHSA-wvhx-q427-fgh3.json"