symfony vulnerabilities and CVEs

Known vulnerabilities affecting symfony, with exploit availability attached to each one, so you can tell a flaw someone has written code for from one nobody has.

5 vulnerabilities tracked.

8.2 The component ScopingHttpClient in Symfony HttpClient merges the options of its default scope (such as authbearer or authbasic) into a… CVE-2026-121971 4 Nov 2026
7.7 Authentication bypass by spoofing in X509Authenticator and X509AuthenticationListener of Symfony versions prior to 5.4.56, 6.x prior to… CVE-2026-118513 4 Nov 2026
6.3 The Symfony Routing components CompiledUrlMatcher and UrlMatcher interpret the host and path information differently, allowing path-based… CVE-2026-118516 4 Nov 2026
5.3 The Symfony HtmlSanitizer component MetaRefreshAttributeSanitizer, introduced to fix CVE-2026-48761, sanitizes the refresh URL of content… CVE-2026-121373 4 Nov 2026
2.3 The Symfony HttpClient component NoPrivateNetworkHttpClient does not pin the checked IP address of cached hosts, allowing for DNS rebinding… CVE-2026-123119 5 Nov 2026

What this covers

This feed accumulates forward from the day it started storing records, and a name search that finds nothing here is also looked up against the registers directly — so an older advisory resolves even when it predates the corpus. It is still a reading view, not a substitute for the vendor's own advisory, and absence from this page is not a statement that symfony is free of vulnerabilities.

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symfony vulnerabilities and CVEs

What this covers

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