{"answers":{"affected":"2 open source packages ship an affected version, including OpenTelemetry.OpAmp.Client. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-42348 in the wild and no public exploit code.","fix":"Upgrade OpenTelemetry.OpAmp.Client to 0.2.0-alpha.1 or later.","what":"CVE-2026-42348 is a medium-severity denial of service vulnerability in open-telemetry opentelemetry-dotnet-contrib, published on 12 May 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-2026-42348 and fix it if it is affected.\n\nWhat it is: CVE-2026-42348 is a medium-severity denial of service vulnerability in open-telemetry opentelemetry-dotnet-contrib, published on 12 May 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-2026-42348 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- OpenTelemetry.OpAmp.Client (NuGet): affected all versions; fixed in 0.2.0-alpha.1\n- OpenTelemetry.OpAmp.Client (NuGet): affected all versions; fixed in 0.2.0-alpha.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-2026-42348/ (Markdown: https://insights.sbomify.com/CVE-2026-42348/index.md)","id":"CVE-2026-42348","markdown":"https://insights.sbomify.com/CVE-2026-42348/index.md","name":"CVE-2026-42348","record":{"aliases":["GHSA-w2jh-77fq-7gp8"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenTelemetry .NET client","requires_auth":"none","summary":"An attacker can cause memory exhaustion in applications using the OpAMP client by sending unbounded HTTP responses, leading to denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"opentelemetry.opamp.client","vendor":"opentelemetry"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/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":"OpenTelemetry.OpAmp.Client is the OpAMP client for OpenTelemetry .NET. Prior to 0.2.0-alpha.1, when receiving responses from the OpAMP server over HTTP, the OpAMP client allocates an unbounded buffer to read all bytes from the server, with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured OpAMP server is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned in the response. This vulnerability is fixed in 0.2.0-alpha.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":"OpAMP client reads unbounded HTTP response bodies","id":"CVE-2026-42348","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"Clerk: Authorization bypass when combining organization, billing, or reverification checks","id":"CVE-2026-42349"},"packages":[{"ecosystem":"NuGet","fixed":["0.2.0-alpha.1"],"introduced":["0"],"last_affected":[],"package":"OpenTelemetry.OpAmp.Client","purl":null,"source":"GHSA-w2jh-77fq-7gp8"},{"ecosystem":"NuGet","fixed":["0.2.0-alpha.1"],"introduced":["0"],"last_affected":[],"package":"OpenTelemetry.OpAmp.Client","purl":"pkg:nuget/OpenTelemetry.OpAmp.Client","source":"GHSA-w2jh-77fq-7gp8"}],"prev":{"headline":"Postiz: TOCTOU DNS rebinding bypasses all SSRF URL validation paths","id":"CVE-2026-42346"},"products":["opentelemetry-dotnet-contrib"],"published":"2026-05-12","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":"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":"2026-05-13","vendors":["open-telemetry"]},"summary":"An attacker can cause memory exhaustion in applications using the OpAMP client by sending unbounded HTTP responses, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2026-42348/"}