CVE-2026-55825 json
Contao: Possible path traversal in job download URIs
published 2026-07-31 3 mo ago modified 2026-09-08 2 mo ago also EUVD-2026-51620 , GHSA-grm4-wm43-9jh5
- cvss
- 3.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
Contao is an Open Source CMS. In versions 5.7.0 through 5.7.6, an authenticated backend user who can access one job can request an attachment identifier containing ../ segments and make the job attachment download endpoint read a file from another job directory inside var/job-attachments. The controller authorizes only the jobUuid route parameter. The later attachment lookup joins that authorized job UUID with the attacker-controlled identifier, then passes the combined path to the virtual filesystem. VirtualFilesystem::resolve() canonicalizes the whole path and only rejects paths that escape the filesystem mount, so authorized-job/../victim-job/debug_log.csv becomes victim-job/debug_log.csv. This is a cross-job authorization bypass for known job attachment paths. It is not a practical brute-force against unknown jobs because job directories are UUID v4 values.
Patch / fix
- packagist contao/contao 5.7.7
- packagist contao/core-bundle 5.7.7
- contao contao 5.7.7
- contao contao_cms 5.7.7
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | contao/contao | >=5.7.0, <5.7.7 |
5.7.7 |
| packagist | contao/core-bundle | >=5.7.0, <5.7.7 |
5.7.7 |
Affected products
- contao contao
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/contao/contao/security/advisories/GHSA-grm4-wm43-9jh5
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-55825
advisory
-
contao.org
/en/security-advisories/path-traversal-in-the-jobs-module
web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2026-55825.yaml
web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2026-55825.yaml
web
-
github.com
/contao/contao
package
Sources
- CVE List CVE-2026-55825
- GitHub Advisory GHSA-grm4-wm43-9jh5
- NVD CVE-2026-55825
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.