{"answers":{"affected":"2 open source packages ship an affected version, including OpenTelemetry.Exporter.Instana.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44213 exists.","fix":"Upgrade OpenTelemetry.Exporter.Instana to 1.1.0 or later.","what":"CVE-2026-44213 is a medium-severity vulnerability in open-telemetry opentelemetry-dotnet-contrib, published on 26 May 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-44213 and fix it if it is affected.\n\nWhat it is: CVE-2026-44213 is a medium-severity vulnerability in open-telemetry opentelemetry-dotnet-contrib, published on 26 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44213 exists.\n\nAffected packages and fixed versions:\n- OpenTelemetry.Exporter.Instana (NuGet): affected all versions; fixed in 1.1.0\n- OpenTelemetry.Exporter.Instana (NuGet): affected all versions; fixed in 1.1.0\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-2026-44213/ (Markdown: https://insights.sbomify.com/CVE-2026-44213/index.md)","id":"CVE-2026-44213","markdown":"https://insights.sbomify.com/CVE-2026-44213/index.md","name":"CVE-2026-44213","record":{"aliases":["GHSA-wfr5-454p-mjc2"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"OpenTelemetry .NET exporter","requires_auth":"high_privilege","summary":"A network attacker can intercept telemetry and API keys via Man-in-the-Middle attacks when a proxy is configured, due to disabled TLS certificate validation.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"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:H/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"The OpenTelemetry.Exporter.Instana exports telemetry to Instana backend. Prior to 1.1.0, the OpenTelemetry.Exporter.Instana NuGet package does not validate HTTPS/TLS certificates are valid when sending telemetry to a configured Instana back-end when a proxy is configured using the INSTANA_ENDPOINT_PROXY environment variable. If a network attacker can Man-in-the-Middle (MitM) the proxy connection, all OpenTelemetry telemetry data and the Instana API key are exposed to the attacker. This vulnerability is fixed in 1.1.0.","ecosystems":["NuGet"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"OpenTelemetry.Exporter.Instana bypasses TLS certificate validation when a proxy is configured","id":"CVE-2026-44213","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"eventsource-encoder: SSE event injection via unsanitized event and id fields","id":"CVE-2026-44214"},"packages":[{"ecosystem":"NuGet","fixed":["1.1.0"],"introduced":["0"],"last_affected":[],"package":"OpenTelemetry.Exporter.Instana","purl":null,"source":"GHSA-wfr5-454p-mjc2"},{"ecosystem":"NuGet","fixed":["1.1.0"],"introduced":["0"],"last_affected":[],"package":"OpenTelemetry.Exporter.Instana","purl":"pkg:nuget/OpenTelemetry.Exporter.Instana","source":"GHSA-wfr5-454p-mjc2"}],"prev":{"headline":"PrestaShop: Stored XSS executable in customer service view","id":"CVE-2026-44212"},"products":["opentelemetry-dotnet-contrib"],"published":"2026-05-26","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-27","vendors":["open-telemetry"]},"summary":"A network attacker can intercept telemetry and API keys via Man-in-the-Middle attacks when a proxy is configured, due to disabled TLS certificate validation.","url":"https://insights.sbomify.com/CVE-2026-44213/"}