{"answers":{"affected":"3 open source packages ship an affected version, including python-socketio.","exploited":"There is no known exploitation of CVE-2026-48804 in the wild and no public exploit code.","fix":"Upgrade python-socketio to 5.16.2 or later.","what":"CVE-2026-48804 is a high-severity denial of service vulnerability in miguelgrinberg python-socketio, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-48804 and fix it if it is affected.\n\nWhat it is: CVE-2026-48804 is a high-severity denial of service vulnerability in miguelgrinberg python-socketio, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-48804 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- python-socketio (PyPI): affected all versions; fixed in 5.16.2\n- python-socketio (PyPI): affected all versions; fixed in 5.16.2\n- python-socketio (PyPI): affected all versions; fixed in 5.16.2\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-2026-48804/ (Markdown: https://insights.sbomify.com/CVE-2026-48804/index.md)","id":"CVE-2026-48804","markdown":"https://insights.sbomify.com/CVE-2026-48804/index.md","name":"CVE-2026-48804","record":{"aliases":["DEBIAN-CVE-2026-48804","GHSA-5w7q-77mv-v69f","PYSEC-2026-3042","ROOT-APP-PYPI-CVE-2026-48804","SUSE-SU-2026:3086-1","UBUNTU-CVE-2026-48804","openSUSE-SU-2026:11171-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Python Socket.IO library","requires_auth":"none","summary":"An attacker can cause a denial of service by sending binary messages with missing attachments, forcing the server to retain them in memory indefinitely.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"python-socketio is a Python implementation of the Socket.IO realtime client and server. The python-socketio server stores binary `EVENT` and `ACK` messages in memory while it waits to receive their binary attachments. Once all the attachments are received, these messages are then processed. Prior to version 5.16.4, an attacker can submit a binary message and intentionally omit sending one or more of its attachments to cause the message along with the partial list of received attachments to stay in memory for a long time. Version 5.16.4 takes the following measures to address this issue: Binary packets are only accepted from authenticated clients and, when a client disconnects, the server checks if there is a partial binary message being held for the client and deletes it.","ecosystems":["PyPI","SUSE:Linux Enterprise Module for Python 3 15 SP7","SUSE:Linux Enterprise Server 15 SP6-LTSS","SUSE:Linux Enterprise Server for SAP Applications 15 SP6","openSUSE:Tumbleweed"],"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":"python-socketio: Binary attachment accumulation can cause denial of service","id":"CVE-2026-48804","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":7,"n_references":2,"next":{"headline":"Twig: Sandbox state regression in deprecated internal wrappers in `src/Resources/core.php`","id":"CVE-2026-48805"},"packages":[{"ecosystem":"PyPI","fixed":["5.16.2"],"introduced":["0"],"last_affected":[],"package":"python-socketio","purl":null,"source":"GHSA-5w7q-77mv-v69f"},{"ecosystem":"PyPI","fixed":["5.16.2"],"introduced":["0"],"last_affected":[],"package":"python-socketio","purl":"pkg:pypi/python-socketio","source":"GHSA-5w7q-77mv-v69f"},{"ecosystem":"PyPI","fixed":["5.16.2"],"introduced":["0"],"last_affected":[],"package":"python-socketio","purl":"pkg:pypi/python-socketio","source":"PYSEC-2026-3042"},{"ecosystem":"SUSE:Linux Enterprise Module for Python 3 15 SP7","fixed":["5.7.2-150600.3.6.1"],"introduced":["0"],"last_affected":[],"package":"python-python-socketio","purl":"pkg:rpm/suse/python-python-socketio\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Python%203%2015%20SP7","source":"SUSE-SU-2026:3086-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP6-LTSS","fixed":["5.7.2-150600.3.6.1"],"introduced":["0"],"last_affected":[],"package":"python-python-socketio","purl":"pkg:rpm/suse/python-python-socketio\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSS","source":"SUSE-SU-2026:3086-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP6","fixed":["5.7.2-150600.3.6.1"],"introduced":["0"],"last_affected":[],"package":"python-python-socketio","purl":"pkg:rpm/suse/python-python-socketio\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6","source":"SUSE-SU-2026:3086-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["5.16.3-1.1"],"introduced":["0"],"last_affected":[],"package":"python-python-socketio","purl":"pkg:rpm/opensuse/python-python-socketio\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:11171-1"}],"prev":{"headline":"python-engineio has unbound thread allocation that can cause denial of service","id":"CVE-2026-48802"},"products":["python-socketio"],"published":"2026-08-11","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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-08-13","vendors":["miguelgrinberg"]},"summary":"An attacker can cause a denial of service by sending binary messages with missing attachments, forcing the server to retain them in memory indefinitely.","url":"https://insights.sbomify.com/CVE-2026-48804/"}