{"answers":{"affected":"1 open source package ship an affected version, including aiohttp.","exploited":"There is no known exploitation of CVE-2026-123817 in the wild and no public exploit code.","exposure":"","fix":"Upgrade aiohttp to 3.14.4 or later.","what":"CVE-2026-123817 is a high-severity vulnerability in aio-libs aiohttp, published on 9 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-123817 and fix it if it is affected.\n\nWhat it is: CVE-2026-123817 is a high-severity vulnerability in aio-libs aiohttp, published on 9 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-123817 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- aiohttp (PyPI): affected all versions; fixed in 3.14.4\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-123817/ (Markdown: https://insights.sbomify.com/CVE-2026-123817/index.md)","id":"CVE-2026-123817","markdown":"https://insights.sbomify.com/CVE-2026-123817/index.md","name":"CVE-2026-123817","record":{"aliases":["CLEANSTART-2026-JF82982","CLEANSTART-2026-NK38254","DEBIAN-CVE-2026-123817","ECHO-e2f8-166f-a041","GHSA-2g87-pp6c-29x5","MINI-547f-39hj-v7jj","MINI-cp36-5rqf-f24q","MINI-jg9v-pxfh-77r9","ROOT-APP-PYPI-CVE-2026-123817","ROOT-APP-PYPI-GHSA-2g87-pp6c-29x5","UBUNTU-CVE-2026-123817"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, the WebSocket reader retains one bytes object for each transport read while reassembling an incomplete frame. A malicious peer can split a frame into many tiny reads so per-object overhead substantially exceeds the payload bytes allowed by max_msg_size. The condition affects a server receiving frames from a malicious client and a client receiving frames from a malicious server, and can cause excessive memory consumption or denial of service. This issue is fixed in version 3.14.4.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"AIOHTTP WebSocket frame reassembly permits excessive memory consumption from tiny reads","id":"CVE-2026-123817","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":6,"next":{"headline":"LMDeploy URL parser disagreement permits SSRF filter bypass","id":"CVE-2026-123818"},"nickname":null,"packages":[{"ecosystem":"PyPI","fixed":["3.14.4"],"introduced":["0"],"last_affected":[],"package":"aiohttp","purl":null,"source":"GHSA-2g87-pp6c-29x5"}],"prev":{"headline":"pyLoad: Authentication bypass in API key validation (check_apikey cache)","id":"CVE-2026-123816"},"products":["aiohttp"],"published":"2026-11-09","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-11-09","vendors":["aio-libs"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-123817/"}