{"id":"CVE-2026-54280","title":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python","summary":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, payload resources are not closed correctly when a client disconnects in the middle of a write. If a payload is using an open file or similar…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-404","CWE-772"],"vendor":"aiohttp","product":"aiohttp","affected":["aiohttp >= 3.12.1, < 3.14.1"],"patched":["aiohttp 3.14.1"],"published":"2026-06-22","updated":"2026-09-16","sourceUpdated":"2026-09-16T20:15:00.917","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54280","references":[{"url":"https://github.com/aio-libs/aiohttp/commit/a762eda5242f6490d6ba667533193f8b473ad587","label":"security-advisories@github.com"},{"url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-9x8q-7h8h-wcw9","label":"security-advisories@github.com"},{"url":"https://github.com/aio-libs/aiohttp"},{"url":"https://github.com/advisories/GHSA-9x8q-7h8h-wcw9"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54280.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-54280"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491471"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-54280"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54280"}],"tags":["nvd","osv","pip","ghsa","csaf","vex","red-hat","score-dispute"],"epss":0.0046,"epssPercentile":0.37209,"aliases":["GHSA-9x8q-7h8h-wcw9","PYSEC-2026-2113"],"ecosystem":"pip","ingestedAt":"2026-07-07T15:41:58.683Z","scores":{"nvd":7.5,"vendor":3.7},"slug":"CVE-2026-54280","body":"## Overview\n\nAIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, payload resources are not closed correctly when a client disconnects in the middle of a write. If a payload is using an open file or similar limited resource, then an attacker may be able to cause resource starvation temporarily until garbage collection or similar closes the file. This vulnerability is fixed in 3.14.1.\n\n## Affected\n\n- `aiohttp >= 3.12.1, < 3.14.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `aiohttp 3.14.1`\n\n## Package advisory (CVE-2026-54280)\n\nAffected packages:\n\n- `aiohttp < 3.14.1`\n\nPatched in:\n\n- `aiohttp 3.14.1`\n\nSource: https://osv.dev/vulnerability/GHSA-9x8q-7h8h-wcw9\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Migration Toolkit for Applications 8, OpenShift Lightspeed · no fix planned: Migration Toolkit for Applications 8, OpenShift Lightspeed · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54280.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":205752,"id":"CVE-2026-54280","ts":1789592771590,"field":"cvss","old":null,"new":"7.5"},{"seq":205751,"id":"CVE-2026-54280","ts":1789592771590,"field":"severity","old":"low","new":"high"}]}