{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-66273 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-66273 is a high-severity denial of service vulnerability in Apache Qpid Proton-J, published on 5 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-2026-66273 and fix it if it is affected.\n\nWhat it is: CVE-2026-66273 is a high-severity denial of service vulnerability in Apache Qpid Proton-J, published on 5 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-2026-66273 in the wild and no public exploit code.\n\nAffected product: Apache Qpid Proton-J. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-66273/ (Markdown: https://insights.sbomify.com/CVE-2026-66273/index.md)","id":"CVE-2026-66273","markdown":"https://insights.sbomify.com/CVE-2026-66273/index.md","name":"CVE-2026-66273","record":{"aliases":["CLEANSTART-2026-YD02167","GHSA-wr2r-m36x-734x"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Java AMQP library","requires_auth":"none","summary":"A pre-authentication attacker can cause excessive memory allocation leading to denial of service in Apache Qpid Proton-J.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"qpid_proton-j","vendor":"apache"}],"cvss":{"score":7.5,"severity":"high","source":"cisa-adp","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-789","name":"Memory Allocation with Excessive Size Value"}],"description":"A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service.\n\nThis issue affects Apache Qpid Proton-J: through 0.34.1.\n\nUsers are recommended to upgrade to version 0.35.0, which fixes the issue.","ecosystems":[],"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":"Apache Qpid Proton-J: Type size/count handling can lead to excessive allocation pre-authentication","id":"CVE-2026-66273","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Apache Qpid Proton-J: Unbounded type nesting can lead to pre-authentication stackoverflow","id":"CVE-2026-66274"},"packages":[],"prev":{"headline":"Missing authorization in Wyse Management Suite (WMS)","id":"CVE-2026-66272"},"products":["Apache Qpid Proton-J"],"published":"2026-08-05","related":[{"cvss_score":7.5,"headline":"Apache Qpid Proton-J: Unbounded symbol value caching can lead to pre-authentication resource exhaustion","id":"CVE-2026-66257","kev_date_added":null,"published":"2026-08-05"},{"cvss_score":7.5,"headline":"Apache Qpid Proton-J: Unbounded type nesting can lead to pre-authentication stackoverflow","id":"CVE-2026-66274","kev_date_added":null,"published":"2026-08-05"},{"cvss_score":7.4,"headline":"Improper Certificate Validation in proton-j","id":"CVE-2018-17187","kev_date_added":null,"published":"2018-11-13"},{"cvss_score":6.5,"headline":"Apache Qpid Proton-J: Incoming session flow control window can be exceeded","id":"CVE-2026-66275","kev_date_added":null,"published":"2026-08-05"},{"cvss_score":6.5,"headline":"Apache Qpid Proton-J: Unbounded disposition range handling can lead to denial of service","id":"CVE-2026-66276","kev_date_added":null,"published":"2026-08-05"},{"cvss_score":6.5,"headline":"Apache Qpid Proton-J: Unable to govern the maximum number of transfer frames per incoming delivery","id":"CVE-2026-66277","kev_date_added":null,"published":"2026-08-05"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"2026-08-06","vendors":["Apache Software Foundation"]},"summary":"A pre-authentication attacker can cause excessive memory allocation leading to denial of service in Apache Qpid Proton-J.","url":"https://insights.sbomify.com/CVE-2026-66273/"}