{"id":"CVE-2026-54273","aliases":["GHSA-4fvr-rgm6-gqmc","PYSEC-2026-2107"],"title":"aiohttp: HTTP/1 Pipelined Requests Queue Without Limit","summary":"aiohttp: HTTP/1 Pipelined Requests Queue Without Limit","severity":"medium","vendor":"aiohttp","product":"aiohttp","ecosystem":"pip","affected":["aiohttp < 3.14.1"],"patched":["aiohttp 3.14.1"],"published":"2026-06-15","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:51:07.881817751Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-4fvr-rgm6-gqmc","references":[{"url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-4fvr-rgm6-gqmc"},{"url":"https://github.com/aio-libs/aiohttp/commit/dfdfa9d5aad5d21f91c79fb2ceeba0f8046cb6cf"},{"url":"https://github.com/aio-libs/aiohttp"},{"url":"https://github.com/advisories/GHSA-4fvr-rgm6-gqmc"}],"tags":["osv","pip","ghsa"],"epss":0.00279,"epssPercentile":0.20616,"cwe":["CWE-770"],"ingestedAt":"2026-07-07T15:41:58.686Z","slug":"CVE-2026-54273","body":"## Overview\n\n### Summary\n\nNo limit was present on the number of pipelined requests that could be queued.\n\n### Impact\n\nAn attacker may be able to use pipelined requests to use excessive amounts of memory, potentially leading to DoS.\n\n-----\n\nPatch: https://github.com/aio-libs/aiohttp/commit/dfdfa9d5aad5d21f91c79fb2ceeba0f8046cb6cf\n\n## Affected packages\n\n- `aiohttp < 3.14.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `aiohttp 3.14.1`","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}