{"answers":{"affected":"8 open source packages ship an affected version, including contao/contao and contao/core-bundle.","exploited":"There is no known exploitation of CVE-2026-55824 in the wild and no public exploit code.","fix":"Upgrade contao/contao to a fixed version for your release line: 5.3.47 or 5.7.7.","what":"CVE-2026-55824 is a low-severity vulnerability in contao, published on 31 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-55824 and fix it if it is affected.\n\nWhat it is: CVE-2026-55824 is a low-severity vulnerability in contao, published on 31 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-55824 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- contao/contao (Packagist): affected from 4.13.0; fixed in 5.3.47\n- contao/contao (Packagist): affected from 4.13.0; fixed in 5.3.47\n- contao/contao (Packagist): affected from 5.4.0; fixed in 5.7.7\n- contao/contao (Packagist): affected from 5.4.0; fixed in 5.7.7\n- contao/core-bundle (Packagist): affected from 4.13.0; fixed in 5.3.47\n- contao/core-bundle (Packagist): affected from 4.13.0; fixed in 5.3.47\n- contao/core-bundle (Packagist): affected from 5.4.0; fixed in 5.7.7\n- contao/core-bundle (Packagist): affected from 5.4.0; fixed in 5.7.7\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-55824/ (Markdown: https://insights.sbomify.com/CVE-2026-55824/index.md)","id":"CVE-2026-55824","markdown":"https://insights.sbomify.com/CVE-2026-55824/index.md","name":"CVE-2026-55824","record":{"aliases":["GHSA-3mr9-p497-58f6"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"Contao CMS","requires_auth":"low_privilege","summary":"Contao CMS leaks Basic or Bearer authentication credentials to external hosts when crawling links, exposing sensitive access tokens to attackers.","user_interaction":"required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":2.6,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"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.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Contao crawler leaks auth credentials to external hosts","id":"CVE-2026-55824","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":8,"n_references":1,"next":{"headline":"Contao: Possible path traversal in job download URIs","id":"CVE-2026-55825"},"packages":[{"ecosystem":"Packagist","fixed":["5.3.47"],"introduced":["4.13.0"],"last_affected":[],"package":"contao/contao","purl":null,"source":"GHSA-3mr9-p497-58f6"},{"ecosystem":"Packagist","fixed":["5.3.47"],"introduced":["4.13.0"],"last_affected":[],"package":"contao/contao","purl":"pkg:composer/contao/contao","source":"GHSA-3mr9-p497-58f6"},{"ecosystem":"Packagist","fixed":["5.7.7"],"introduced":["5.4.0"],"last_affected":[],"package":"contao/contao","purl":null,"source":"GHSA-3mr9-p497-58f6"},{"ecosystem":"Packagist","fixed":["5.7.7"],"introduced":["5.4.0"],"last_affected":[],"package":"contao/contao","purl":"pkg:composer/contao/contao","source":"GHSA-3mr9-p497-58f6"},{"ecosystem":"Packagist","fixed":["5.3.47"],"introduced":["4.13.0"],"last_affected":[],"package":"contao/core-bundle","purl":null,"source":"GHSA-3mr9-p497-58f6"},{"ecosystem":"Packagist","fixed":["5.3.47"],"introduced":["4.13.0"],"last_affected":[],"package":"contao/core-bundle","purl":"pkg:composer/contao/core-bundle","source":"GHSA-3mr9-p497-58f6"},{"ecosystem":"Packagist","fixed":["5.7.7"],"introduced":["5.4.0"],"last_affected":[],"package":"contao/core-bundle","purl":null,"source":"GHSA-3mr9-p497-58f6"},{"ecosystem":"Packagist","fixed":["5.7.7"],"introduced":["5.4.0"],"last_affected":[],"package":"contao/core-bundle","purl":"pkg:composer/contao/core-bundle","source":"GHSA-3mr9-p497-58f6"}],"prev":{"headline":"Frappe: Possibility of SQL injection in reportview","id":"CVE-2026-55823"},"products":["contao"],"published":"2026-07-31","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-31","vendors":["contao"]},"summary":"Contao CMS leaks Basic or Bearer authentication credentials to external hosts when crawling links, exposing sensitive access tokens to attackers.","url":"https://insights.sbomify.com/CVE-2026-55824/"}