{"answers":{"affected":"4 open source packages ship an affected version, including CoreWCF.Kafka.","exploited":"There is no known exploitation of CVE-2026-54775 in the wild and no public exploit code.","fix":"Upgrade CoreWCF.Kafka to a fixed version for your release line: 1.8.1 or 1.9.1.","what":"CVE-2026-54775 is a medium-severity denial of service vulnerability in CoreWCF, published on 8 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-54775 and fix it if it is affected.\n\nWhat it is: CVE-2026-54775 is a medium-severity denial of service vulnerability in CoreWCF, published on 8 Jul 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-2026-54775 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- CoreWCF.Kafka (NuGet): affected all versions; fixed in 1.8.1\n- CoreWCF.Kafka (NuGet): affected all versions; fixed in 1.8.1\n- CoreWCF.Kafka (NuGet): affected from 1.9.0; fixed in 1.9.1\n- CoreWCF.Kafka (NuGet): affected from 1.9.0; fixed in 1.9.1\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-2026-54775/ (Markdown: https://insights.sbomify.com/CVE-2026-54775/index.md)","id":"CVE-2026-54775","markdown":"https://insights.sbomify.com/CVE-2026-54775/index.md","name":"CVE-2026-54775","record":{"aliases":["GHSA-m744-jhq9-ppw6"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"CoreWCF Kafka transport","requires_auth":"low_privilege","summary":"An attacker with produce permissions can cause a permanent denial of service in CoreWCF services by sending a null-value Kafka record.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"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-755","name":"Improper Handling of Exceptional Conditions"},{"id":"CWE-754","name":"Improper Check for Unusual or Exceptional Conditions"},{"id":"CWE-248","name":"Uncaught Exception"}],"description":"CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, a CoreWCF service listening on a Kafka topic stops processing new records from that topic when KafkaTransportPump receives a null-value tombstone record, causing a persistent endpoint denial of service for attackers with produce permission. This issue is fixed in versions 1.8.1 and 1.9.1.","ecosystems":["NuGet"],"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":"CoreWCF: Kafka consume pump halts permanently on a Kafka tombstone (null-value record), causing persistent endpoint denial of service.","id":"CVE-2026-54775","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":4,"n_references":6,"next":{"headline":"CoreWCF: Unix Domain Socket PosixIdentity transport accepts connections that skip the security upgrade","id":"CVE-2026-54776"},"packages":[{"ecosystem":"NuGet","fixed":["1.8.1"],"introduced":["0"],"last_affected":[],"package":"CoreWCF.Kafka","purl":null,"source":"GHSA-m744-jhq9-ppw6"},{"ecosystem":"NuGet","fixed":["1.8.1"],"introduced":["0"],"last_affected":[],"package":"CoreWCF.Kafka","purl":"pkg:nuget/CoreWCF.Kafka","source":"GHSA-m744-jhq9-ppw6"},{"ecosystem":"NuGet","fixed":["1.9.1"],"introduced":["1.9.0"],"last_affected":[],"package":"CoreWCF.Kafka","purl":null,"source":"GHSA-m744-jhq9-ppw6"},{"ecosystem":"NuGet","fixed":["1.9.1"],"introduced":["1.9.0"],"last_affected":[],"package":"CoreWCF.Kafka","purl":"pkg:nuget/CoreWCF.Kafka","source":"GHSA-m744-jhq9-ppw6"}],"prev":{"headline":"CoreWCF: SamlSerializer skips SignatureValue verification when SAML signing token is not an X.509 certificate","id":"CVE-2026-54774"},"products":["CoreWCF"],"published":"2026-07-08","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":"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":"2026-07-09","vendors":["CoreWCF"]},"summary":"An attacker with produce permissions can cause a permanent denial of service in CoreWCF services by sending a null-value Kafka record.","url":"https://insights.sbomify.com/CVE-2026-54775/"}