CVE-2026-54273: aiohttp: HTTP/1 Pipelined Requests Queue Without Limit

June 15, 2026

No limit was present on the number of pipelined requests that could be queued.

References

github.com/advisories/GHSA-4fvr-rgm6-gqmc
github.com/aio-libs/aiohttp/commit/dfdfa9d5aad5d21f91c79fb2ceeba0f8046cb6cf
github.com/aio-libs/aiohttp/security/advisories/GHSA-4fvr-rgm6-gqmc
nvd.nist.gov/vuln/detail/CVE-2026-54273

Code Behaviors & Features

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