{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-12343 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-12343 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-12343 is a medium-severity denial of service vulnerability in IBM MQ Advanced container images, published on 19 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-12343 and fix it if it is affected.\n\nWhat it is: CVE-2026-12343 is a medium-severity denial of service vulnerability in IBM MQ Advanced container images, published on 19 Oct 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-2026-12343 in the wild and no public exploit code.\n\nAffected product: IBM MQ Advanced container images. 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-2026-12343/ (Markdown: https://insights.sbomify.com/CVE-2026-12343/index.md)","id":"CVE-2026-12343","markdown":"https://insights.sbomify.com/CVE-2026-12343/index.md","name":"CVE-2026-12343","record":{"aliases":["GHSA-4vv9-m5xv-x4cc"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"IBM MQ messaging","requires_auth":"low_privilege","summary":"An authenticated attacker can cause a denial of service in IBM MQ by exploiting improper validation of RFH2 message headers in publish/subscribe operations.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"ibm","cpe":[{"product":"mq_operator","vendor":"ibm"},{"product":"supplied_mq_advanced_container_images","vendor":"ibm"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"IBM MQ could allow an authenticated attacker to cause a denial of service due to improper validation of RFH2 message header fields in queued publish/subscribe operations.","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 Denial of Service","id":"CVE-2026-12343","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":"Race condition in tempfile.TemporaryDirectory cleanup allows deleting files outside the temporary directory","id":"CVE-2026-12345"},"packages":[],"prev":{"headline":"SailPoint IdentityIQ Improper Form Validation Vulnerability","id":"CVE-2026-12342"},"products":["MQ Advanced container images","MQ Operator"],"published":"2026-10-19","related":[{"cvss_score":8.8,"headline":"IBM MQ Buffer Overflow","id":"CVE-2026-10572","kev_date_added":null,"published":"2026-10-19"},{"cvss_score":8.8,"headline":"IBM MQ Buffer Overflow","id":"CVE-2026-10574","kev_date_added":null,"published":"2026-10-19"},{"cvss_score":8.8,"headline":"IBM MQ Race Condition","id":"CVE-2026-10743","kev_date_added":null,"published":"2026-10-19"},{"cvss_score":8.1,"headline":"IBM MQ Buffer Overflow","id":"CVE-2026-12665","kev_date_added":null,"published":"2026-10-19"},{"cvss_score":8.1,"headline":"IBM MQ Container authentication bypass","id":"CVE-2024-39742","kev_date_added":null,"published":"2024-07-08"},{"cvss_score":7.5,"headline":"IBM MQ Deserialization of Untrusted Data","id":"CVE-2026-12148","kev_date_added":null,"published":"2026-10-19"},{"cvss_score":7.5,"headline":"IBM MQ security bypass","id":"CVE-2024-40681","kev_date_added":null,"published":"2024-09-07"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["IBM"]},"summary":"An authenticated attacker can cause a denial of service in IBM MQ by exploiting improper validation of RFH2 message headers in publish/subscribe operations.","url":"https://insights.sbomify.com/CVE-2026-12343/"}