{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-12666 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-12666 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-12666 is a high-severity vulnerability in IBM MQ, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-12666 and fix it if it is affected.\n\nWhat it is: CVE-2026-12666 is a high-severity vulnerability in IBM MQ, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-12666 in the wild and no public exploit code.\n\nAffected product: IBM MQ. 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-2026-12666/ (Markdown: https://insights.sbomify.com/CVE-2026-12666/index.md)","id":"CVE-2026-12666","markdown":"https://insights.sbomify.com/CVE-2026-12666/index.md","name":"CVE-2026-12666","record":{"aliases":["GHSA-8mq2-hm2c-3ccx"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["data_read","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"IBM MQ messaging","requires_auth":"low_privilege","summary":"An authenticated attacker can exploit XML external entity injection in IBM MQ Java messaging to obtain sensitive information or cause a denial of service.","user_interaction":"not_required","vuln_class":"xxe"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"ibm","cpe":[],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-611","name":"Improper Restriction of XML External Entity Reference"}],"description":"IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 Classes for Java could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to XML external entity injection in MQRFH2 header processing.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"IBM MQ Java messaging is vulnerable to XML external entity injection","id":"CVE-2026-12666","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xxe","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"IBM MQ .NET client is vulnerable to XML external entity injection","id":"CVE-2026-12667"},"packages":[],"prev":{"headline":"IBM MQ Buffer Overflow","id":"CVE-2026-12665"},"products":["MQ"],"published":"2026-09-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-17","vendors":["IBM"]},"summary":"An authenticated attacker can exploit XML external entity injection in IBM MQ Java messaging to obtain sensitive information or cause a denial of service.","url":"https://insights.sbomify.com/CVE-2026-12666/"}