GHSA-mrvp-7wmx-5m4h

Suggest an improvement
Source
https://github.com/advisories/GHSA-mrvp-7wmx-5m4h
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mrvp-7wmx-5m4h/GHSA-mrvp-7wmx-5m4h.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-mrvp-7wmx-5m4h
Aliases
  • CVE-2026-107844
Published
2026-10-09T20:53:55Z
Modified
2026-10-09T21:00:10Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
Contao: Path traversal in the images controller
Details

ImagesController joins the user controlled {path} onto the configured image target directory with Path::join(), which canonicalises .. segments, and never calls Path::isBasePath() to confirm the result stayed inside that directory. An unauthenticated GET with percent encoded dot segments therefore escapes the directory and the file is returned by BinaryFileResponse. Reads are bounded to the extensions in contao.image.valid_extensions, and paths below the upload directory fail for an unrelated reason, so this is reported as a missing boundary check rather than as a general arbitrary file read. Both Apache with the shipped public/.htaccess and nginx with the documented configuration are affected.

Impact

Any unauthenticated visitor can read files that are deliberately kept outside the document root, anywhere under the project directory, as long as the name ends in one of contao.image.valid_extensions (jpg, jpeg, gif, png, tif, tiff, bmp, svg, svgz, webp). The route also acts as an existence oracle for arbitrary paths, and on a debug enabled instance the 404 message discloses the absolute filesystem path.

Honesty caveat, stated because it lowers the severity. The reporter could not use this to read protected member folders: every path below the upload directory returns 500 for the reason given under Details, so the practically reachable set is image typed files outside files/.

Database specific 
{
    "cwe_ids": [
        "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-09T20:53:55Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
}
References

Affected packages

Packagist / contao/core-bundle

Package

Name
contao/core-bundle
Purl
pkg:composer/contao/core-bundle

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.1.0
Fixed
5.3.50

Affected versions

4.*
4.1.0
4.1.1
4.1.2
4.1.3
4.2.0-beta1
4.2.0-RC1
4.2.0
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.3.0-RC1
4.3.0
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.3.6
4.3.7
4.3.8
4.3.9
4.3.10
4.3.11
4.4.0-beta1
4.4.0-RC1
4.4.0-RC2
4.4.0
4.4.1
4.4.2
4.4.3
4.4.4
4.4.5
4.4.6
4.4.7
4.4.8
4.4.9
4.4.10
4.4.11
4.4.12
4.4.13
4.4.14
4.4.15
4.4.16
4.4.17
4.4.18
4.4.19
4.4.20
4.4.21
4.4.22
4.4.23
4.4.24
4.4.25
4.4.26
4.4.27
4.4.28
4.4.29
4.4.30
4.4.31
4.4.32
4.4.33
4.4.34
4.4.35
4.4.36
4.4.37
4.4.38
4.4.39
4.4.40
4.4.41
4.4.42
4.4.43
4.4.44
4.4.45
4.4.46
4.4.47
4.4.48
4.4.49
4.4.50
4.4.51
4.4.52
4.4.53
4.4.54
4.4.55
4.4.56
4.4.57
4.5.0-beta1
4.5.0-beta2
4.5.0-beta3
4.5.0-RC1
4.5.0-RC2
4.5.0
4.5.1
4.5.2
4.5.3
4.5.4
4.5.5
4.5.6
4.5.7
4.5.8
4.5.9
4.5.10
4.5.11
4.5.12
4.5.13
4.5.14
4.6.0-RC1
4.6.0-RC2
4.6.0-RC3
4.6.0
4.6.1
4.6.2
4.6.3
4.6.4
4.6.5
4.6.6
4.6.7
4.6.8
4.6.9
4.6.10
4.6.11
4.6.12
4.6.13
4.6.14
4.7.0-RC1
4.7.0-RC2
4.7.0-RC3
4.7.0-RC4
4.7.0
4.7.1
4.7.2
4.7.3
4.7.4
4.7.5
4.7.6
4.7.7
4.8.0-RC1
4.8.0-RC2
4.8.0
4.8.1
4.8.2
4.8.3
4.8.4
4.8.5
4.8.6
4.8.7
4.8.8
4.9.0-RC1
4.9.0-RC2
4.9.0
4.9.1
4.9.2
4.9.3
4.9.4
4.9.5
4.9.6
4.9.7
4.9.8
4.9.9
4.9.10
4.9.11
4.9.12
4.9.13
4.9.14
4.9.15
4.9.16
4.9.17
4.9.18
4.9.19
4.9.20
4.9.21
4.9.22
4.9.23
4.9.24
4.9.25
4.9.26
4.9.27
4.9.28
4.9.29
4.9.30
4.9.31
4.9.32
4.9.33
4.9.34
4.9.35
4.9.36
4.9.37
4.9.38
4.9.39
4.9.40
4.9.41
4.9.42
4.10.0-RC1
4.10.0-RC2
4.10.0-RC3
4.10.0-RC4
4.10.0
4.10.1
4.10.2
4.10.3
4.10.4
4.10.5
4.10.6
4.10.7
4.11.0-RC1
4.11.0-RC2
4.11.0
4.11.1
4.11.2
4.11.3
4.11.4
4.11.5
4.11.6
4.11.7
4.11.8
4.11.9
4.12.0-RC1
4.12.0-RC2
4.12.0-RC3
4.12.0
4.12.1
4.12.2
4.12.3
4.12.4
4.12.5
4.12.6
4.12.7
4.13.0-RC1
4.13.0-RC2
4.13.0-RC3
4.13.0
4.13.1
4.13.2
4.13.3
4.13.4
4.13.5
4.13.6
4.13.7
4.13.8
4.13.9
4.13.10
4.13.11
4.13.12
4.13.13
4.13.14
4.13.15
4.13.16
4.13.17
4.13.18
4.13.19
4.13.20
4.13.21
4.13.22
4.13.23
4.13.24
4.13.25
4.13.26
4.13.27
4.13.28
4.13.29
4.13.30
4.13.31
4.13.32
4.13.33
4.13.34
4.13.35
4.13.36
4.13.37
4.13.38
4.13.39
4.13.40
4.13.41
4.13.42
4.13.43
4.13.44
4.13.45
4.13.46
4.13.47
4.13.48
4.13.49
4.13.50
4.13.51
4.13.52
4.13.53
4.13.54
4.13.55
4.13.56
4.13.57
4.13.58
5.*
5.0.0-RC1
5.0.0-RC2
5.0.0-RC3
5.0.0-RC4
5.0.0
5.0.1
5.0.2
5.0.3
5.0.4
5.0.5
5.0.6
5.0.7
5.0.8
5.0.9
5.0.10
5.1.0-RC1
5.1.0-RC2
5.1.0-RC3
5.1.0
5.1.1
5.1.2
5.1.3
5.1.4
5.1.5
5.1.6
5.1.7
5.1.8
5.1.9
5.1.10
5.1.11
5.2.0-RC1
5.2.0-RC2
5.2.0-RC3
5.2.0-RC4
5.2.0-RC5
5.2.0-RC6
5.2.0
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.2.6
5.2.7
5.2.8
5.2.9
5.2.10
5.3.0-RC1
5.3.0-RC2
5.3.0-RC3
5.3.0-RC4
5.3.0
5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7
5.3.8
5.3.9
5.3.10
5.3.11
5.3.12
5.3.13
5.3.14
5.3.15
5.3.16
5.3.17
5.3.18
5.3.19
5.3.20
5.3.21
5.3.22
5.3.23
5.3.24
5.3.25
5.3.26
5.3.27
5.3.28
5.3.29
5.3.30
5.3.31
5.3.32
5.3.33
5.3.34
5.3.35
5.3.36
5.3.37
5.3.38
5.3.39
5.3.40
5.3.41
5.3.42
5.3.43
5.3.44
5.3.45
5.3.46
5.3.47
5.3.48
5.3.49

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mrvp-7wmx-5m4h/GHSA-mrvp-7wmx-5m4h.json"

Packagist / contao/core-bundle

Package

Name
contao/core-bundle
Purl
pkg:composer/contao/core-bundle

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.4.0-RC1
Fixed
5.7.12

Affected versions

5.*
5.4.0-RC1
5.4.0-RC2
5.4.0-RC3
5.4.0-RC4
5.4.0
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.4.7
5.4.8
5.4.9
5.4.10
5.4.11
5.4.12
5.4.13
5.4.14
5.5.0-RC1
5.5.0-RC2
5.5.0-RC3
5.5.0-RC4
5.5.0
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.5.6
5.5.7
5.5.8
5.5.9
5.5.10
5.5.11
5.5.12
5.5.13
5.5.14
5.5.15
5.5.16
5.6.0-RC1
5.6.0-RC2
5.6.0-RC3
5.6.0
5.6.1
5.6.2
5.6.3
5.6.4
5.6.5
5.6.6
5.6.7
5.6.8
5.6.9
5.6.10
5.6.11
5.7.0-RC1
5.7.0-RC2
5.7.0-RC3
5.7.0-RC4
5.7.0
5.7.1
5.7.2
5.7.3
5.7.4
5.7.5
5.7.6
5.7.7
5.7.8
5.7.9
5.7.10
5.7.11

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mrvp-7wmx-5m4h/GHSA-mrvp-7wmx-5m4h.json"