{"answers":{"affected":"2 open source packages ship an affected version, including aiohttp.","exploited":"There is no known exploitation of CVE-2026-111749 in the wild and no public exploit code.","fix":"Upgrade aiohttp to 3.14.4 or later.","what":"CVE-2026-111749 is a low-severity vulnerability in aio-libs aiohttp, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-111749 and fix it if it is affected.\n\nWhat it is: CVE-2026-111749 is a low-severity vulnerability in aio-libs aiohttp, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-111749 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- 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-2026-111749/ (Markdown: https://insights.sbomify.com/CVE-2026-111749/index.md)","id":"CVE-2026-111749","markdown":"https://insights.sbomify.com/CVE-2026-111749/index.md","name":"CVE-2026-111749","record":{"aliases":["AZL-110692","DEBIAN-CVE-2026-111749","ECHO-a1d2-3cce-f75b","GHSA-gx76-c99x-2c96","MINI-36q4-q7m6-h4cx","MINI-88j2-483r-j3r5","MINI-m58f-6xpj-j45c","UBUNTU-CVE-2026-111749"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Python HTTP library","requires_auth":"none","summary":"A malicious subdomain can strip host-only protections from existing cookies in the aiohttp library, potentially weakening cookie isolation mechanisms.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":2.3,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-565","name":"Reliance on Cookies without Validation and Integrity Checking"}],"description":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, Host-Only scope on an existing parent-domain cookie can be removed by a subdomain. A user who accesses an untrusted subdomain can consequently have host-only protections stripped from cookies, although impact is limited when applications do not reflect those cookies to a browser. 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: Cookie from subdomain can remove Host-Only Scope from existing cookies","id":"CVE-2026-111749","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"AIOHTTP: Pure-Python parser request smuggling","id":"CVE-2026-111750"},"packages":[{"ecosystem":"PyPI","fixed":["3.14.4"],"introduced":["0"],"last_affected":[],"package":"aiohttp","purl":null,"source":"GHSA-gx76-c99x-2c96"},{"ecosystem":"PyPI","fixed":["3.14.4"],"introduced":["0"],"last_affected":[],"package":"aiohttp","purl":"pkg:pypi/aiohttp","source":"GHSA-gx76-c99x-2c96"}],"prev":{"headline":"AIOHTTP: Absolute-form request targets can spoof Request.scheme","id":"CVE-2026-111748"},"products":["aiohttp"],"published":"2026-10-19","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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-22","vendors":["aio-libs"]},"summary":"A malicious subdomain can strip host-only protections from existing cookies in the aiohttp library, potentially weakening cookie isolation mechanisms.","url":"https://insights.sbomify.com/CVE-2026-111749/"}