GHSA-4j38-f5cw-54h7

Suggest an improvement
Source
https://github.com/advisories/GHSA-4j38-f5cw-54h7
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-4j38-f5cw-54h7/GHSA-4j38-f5cw-54h7.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-4j38-f5cw-54h7
Aliases
  • CVE-2026-46628
Related
Published
2026-05-21T21:21:35Z
Modified
2026-05-23T18:29:19.441502512Z
Severity
  • 1.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U CVSS Calculator
Summary
Twig: The `spaceless` filter implicitly marks its output as safe
Details

Description

The spaceless filter is registered with is_safe => ['html'], which means Twig's autoescaper does not escape its output in an HTML context. As a result, applying spaceless to attacker-controlled input that contains markup emits the markup unescaped even when the developer never wrote |raw and autoescape is enabled.

Example:

{% set payload = '<script>alert()</script>' %}
{{ payload }}          {# escaped #}
{{ payload|spaceless }} {# not escaped #}

The filter is deprecated but still functional. With the deprecation, some downstream projects (e.g. Drupal modules) have duplicated the filter and inherited the same is_safe flag.

Resolution

The spaceless filter no longer marks its output as safe. Documentation has been updated to warn that spaceless should not be applied to unsanitised user input.

Credits

Twig would like to thank Pierre Rudloff for reporting the issue.

Database specific 
{
    "cwe_ids": [
        "CWE-116"
    ],
    "github_reviewed": true,
    "nvd_published_at": null,
    "github_reviewed_at": "2026-05-21T21:21:35Z",
    "severity": "LOW"
}
References

Affected packages

Packagist / twig/twig

Package

Name
twig/twig
Purl
pkg:composer/twig%2Ftwig

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.26.0

Affected versions

1.*
1.3.0
1.4.0
1.5.0
1.5.1
1.6.0
1.6.1
1.6.2
1.6.3
1.6.4
1.6.5
v1.*
v1.7.0
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.9.0
v1.9.1
v1.9.2
v1.10.0
v1.10.1
v1.10.2
v1.10.3
v1.11.0
v1.11.1
v1.12.0-RC1
v1.12.0
v1.12.1
v1.12.2
v1.12.3
v1.13.0
v1.13.1
v1.13.2
v1.14.0
v1.14.1
v1.14.2
v1.15.0
v1.15.1
v1.16.0
v1.16.1
v1.16.2
v1.16.3
v1.17.0
v1.18.0
v1.18.1
v1.18.2
v1.19.0
v1.20.0
v1.21.0
v1.21.1
v1.21.2
v1.22.0
v1.22.1
v1.22.2
v1.22.3
v1.23.0
v1.23.1
v1.23.2
v1.23.3
v1.24.0
v1.24.1
v1.24.2
v1.25.0
v1.26.0
v1.26.1
v1.27.0
v1.28.0
v1.28.1
v1.28.2
v1.29.0
v1.30.0
v1.31.0
v1.32.0
v1.33.0
v1.33.1
v1.33.2
v1.34.0
v1.34.1
v1.34.2
v1.34.3
v1.34.4
v1.35.0
v1.35.1
v1.35.2
v1.35.3
v1.35.4
v1.36.0
v1.37.0
v1.37.1
v1.38.0
v1.38.1
v1.38.2
v1.38.3
v1.38.4
v1.39.0
v1.39.1
v1.40.0
v1.40.1
v1.41.0
v1.42.0
v1.42.1
v1.42.2
v1.42.3
v1.42.4
v1.42.5
v1.43.0
v1.43.1
v1.44.0
v1.44.1
v1.44.2
v1.44.3
v1.44.4
v1.44.5
v1.44.6
v1.44.7
v1.44.8
v2.*
v2.0.0
v2.1.0
v2.2.0
v2.3.0
v2.3.1
v2.3.2
v2.4.0
v2.4.1
v2.4.2
v2.4.3
v2.4.4
v2.4.5
v2.4.6
v2.4.7
v2.4.8
v2.5.0
v2.6.0
v2.6.1
v2.6.2
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v2.7.4
v2.8.0
v2.8.1
v2.9.0
v2.10.0
v2.11.0
v2.11.1
v2.11.2
v2.11.3
v2.12.0
v2.12.1
v2.12.2
v2.12.3
v2.12.4
v2.12.5
v2.13.0
v2.13.1
v2.14.0
v2.14.1
v2.14.2
v2.14.3
v2.14.4
v2.14.5
v2.14.6
v2.14.7
v2.14.8
v2.14.9
v2.14.10
v2.14.11
v2.14.12
v2.14.13
v2.15.0
v2.15.1
v2.15.2
v2.15.3
v2.15.4
v2.15.5
v2.15.6
v2.16.0
v2.16.1
v3.*
v3.0.0-BETA1
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.0.4
v3.0.5
v3.1.0
v3.1.1
v3.2.1
v3.3.0
v3.3.1
v3.3.2
v3.3.3
v3.3.4
v3.3.5
v3.3.6
v3.3.7
v3.3.8
v3.3.9
v3.3.10
v3.4.0
v3.4.1
v3.4.2
v3.4.3
v3.5.0
v3.5.1
v3.6.0
v3.6.1
v3.7.0
v3.7.1
v3.8.0
v3.9.0
v3.9.1
v3.9.2
v3.9.3
v3.10.0
v3.10.1
v3.10.2
v3.10.3
v3.11.0
v3.11.1
v3.11.2
v3.11.3
v3.12.0
v3.13.0
v3.14.0
v3.14.1
v3.14.2
v3.15.0
v3.16.0
v3.17.0
v3.17.1
v3.18.0
v3.19.0
v3.20.0
v3.21.0
v3.21.1
v3.22.0
v3.22.1
v3.22.2
v3.23.0
v3.24.0
v3.25.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-4j38-f5cw-54h7/GHSA-4j38-f5cw-54h7.json"