H3: Unbounded Chunked Cookie Count in Session Cleanup Loop may Lead to Denial of Service

Summary The setChunkedCookie and deleteChunkedCookie functions in h3 trust the chunk count parsed from a user-controlled cookie value chunkedN without any upper bound validation. An unauthenticated attacker can send a single request with a crafted cookie header e.g., Cookie: h3=chunked999999 to a...

GHSA-Q5PR-72PQ-83V3 H3: Unbounded Chunked Cookie Count in Session Cleanup Loop may Lead to Denial of Service

Summary The setChunkedCookie and deleteChunkedCookie functions in h3 trust the chunk count parsed from a user-controlled cookie value chunkedN without any upper bound validation. An unauthenticated attacker can send a single request with a crafted cookie header e.g., Cookie: h3=chunked999999 to a...

SUSE CVE-2025-58186

Despite HTTP headers having a default limit of 1MB, the number of cookies that can be parsed does not have a limit. By sending a lot of very small cookies such as "a=;", an attacker can make an HTTP server allocate a large amount of structs, causing large memory consumption...