CVE-2026-55824
- Source
- https://cve.org/CVERecord?id=CVE-2026-55824
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55824.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-55824
- Aliases
- Published
- 2026-07-31T19:04:00Z
- Modified
- 2026-09-10T03:31:03Z
- Severity
-
- 2.6 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N CVSS Calculator
- Summary
- Contao crawler leaks auth credentials to external hosts
- Details
-
Contao is an Open Source CMS. In versions 4.13.40 through 5.3.46 and 5.7.0-RC1 through 5.7.6, the crawler leaks auth credentials to external hosts. Contao's crawler tries to prevent confidential HTTP client options from being sent to external domains by creating a scoped client: full options for root page origins, cleaned options for everything else. The cleaner removes Cookie and Authorization headers, but it removes the non-Symfony option names basic_auth and bearer_auth instead of Symfony HttpClient's real auth_basic and auth_bearer options. When contao.crawl.default_http_client_options contains Basic or Bearer authentication for a protected staging/production site, those credentials remain in the "clean" client used for external links or configured additional URIs. An attacker who can get an external URL crawled, for example through a link on a crawled page while the broken-link checker is enabled, can receive the crawler credentials. This issue has been fixed in versions 5.3.47 and 5.7.7.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-200" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55824.json" }- References