{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-77409 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-77409 is a high-severity denial of service vulnerability in rabbitmq amqp091-go, published on 16 Sep 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-2026-77409 and fix it if it is affected.\n\nWhat it is: CVE-2026-77409 is a high-severity denial of service vulnerability in rabbitmq amqp091-go, published on 16 Sep 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-2026-77409 in the wild and no public exploit code.\n\nAffected product: rabbitmq amqp091-go. 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-2026-77409/ (Markdown: https://insights.sbomify.com/CVE-2026-77409/index.md)","id":"CVE-2026-77409","markdown":"https://insights.sbomify.com/CVE-2026-77409/index.md","name":"CVE-2026-77409","record":{"aliases":["AZL-103197","AZL-103281","DEBIAN-CVE-2026-77409","GHSA-wxx3-cj7g-w73j","UBUNTU-CVE-2026-77409"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Go AMQP client library","requires_auth":"none","summary":"An attacker can cause denial of service in RabbitMQ Go clients by triggering event bursts that block the reader goroutine if channels are unbuffered or full.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.dispatch in channel.go, confirms.confirm in confirms.go, and Connection.dispatch0 in connection.go synchronously send publisher confirmations, flow-control events, consumer cancellations, returned messages, including NotifyConfirm events and connection block notifications, to application-provided channels. If a listener channel is unbuffered, full, or not drained promptly, the sole reader goroutine blocks and stops processing frames, acknowledgments, deliveries, and heartbeats. Broker-driven event bursts can therefore cause connection stalls, missed heartbeats, deadlocks, and disconnection. This issue is fixed in version 1.13.0.","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":"RabbitMQ amqp091-go: Denial of Service via Synchronous Event Channel Blocking","id":"CVE-2026-77409","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"RabbitMQ amqp091-go: Resource Exhaustion (OOM) via Unbounded Body Buffer Allocation","id":"CVE-2026-77410"},"packages":[],"prev":{"headline":"RabbitMQ amqp091-go: Silent Data Truncation and State Corruption via Shortstr Integer Overflow","id":"CVE-2026-77408"},"products":["amqp091-go"],"published":"2026-09-16","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-18","vendors":["rabbitmq"]},"summary":"An attacker can cause denial of service in RabbitMQ Go clients by triggering event bursts that block the reader goroutine if channels are unbuffered or full.","url":"https://insights.sbomify.com/CVE-2026-77409/"}