CVE-2026-55824

Sažetak

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.

Reference

CVSS

Base:	2.6
Impact:	1.4
Exploitability:	1.2

Pristup

Vektor	Složenost	Autentikacija
NETWORK	HIGH	LOW

Impact

Povjerljivost	Cjelovitost	Dostupnost
LOW	NONE	NONE

CVSS vektor

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N

Zadnje važnije ažuriranje

31-07-2026 - 20:16

Objavljeno

31-07-2026 - 19:17