Information disclosure in Contao
CVE-2026-55824
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 exter…
Vulnerability class: Information Disclosure
CVSS v3 metric
CVSS v3 base score 2.6 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N.
Affected products
- Contao — versions >= 4.13.40, < 5.3.47, >= 5.7.0-RC1, < 5.7.7
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-55824?
- CVE-2026-55824 is a low-severity vulnerability in Contao, classified under Information Disclosure. CVSS score: 2.6/10. Published 2026-07-31.
- How severe is CVE-2026-55824?
- Low severity. CVSS v3 base score is 2.6 out of 10.