{"answers":{"affected":"2 open source packages ship an affected version, including ebay-mcp.","exploited":"There is no known exploitation of CVE-2026-27203 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-27203 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-27203 is a high-severity code injection vulnerability in YosefHayim ebay-mcp, published on 20 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-27203 and fix it if it is affected.\n\nWhat it is: CVE-2026-27203 is a high-severity code injection vulnerability in YosefHayim ebay-mcp, published on 20 Feb 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-2026-27203 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- ebay-mcp (npm): affected all versions up to 1.7.2; no fix listed\n- ebay-mcp (npm): affected all versions up to 1.7.2; no fix listed\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-2026-27203/ (Markdown: https://insights.sbomify.com/CVE-2026-27203/index.md)","id":"CVE-2026-27203","markdown":"https://insights.sbomify.com/CVE-2026-27203/index.md","name":"CVE-2026-27203","record":{"aliases":["GHSA-97rm-xj73-33jh"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"eBay API MCP Server","requires_auth":"low_privilege","summary":"Attackers can inject arbitrary environment variables via the token update tool, potentially leading to remote code execution or denial of service.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component"},{"id":"CWE-15","name":"External Control of System or Configuration Setting"}],"description":"eBay API MCP Server is an open source local MCP server providing AI assistants with comprehensive access to eBay's Sell APIs. All versions are vulnerable to Environment Variable Injection through the updateEnvFile function. The ebay_set_user_tokens tool allows updating the .env file with new tokens. The updateEnvFile function in src/auth/oauth.ts blindly appends or replaces values without validating them for newlines or quotes. This allows an attacker to inject arbitrary environment variables into the configuration file. An attacker can inject arbitrary environment variables into the .env file. This could lead to configuration overwrites, Denial of Service, and potential RCE. There was no fix for this issue at the time of publication.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"eBay API MCP Server Affected by Environment Variable Injection","id":"CVE-2026-27203","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"Wasmtime WASI implementations are vulnerable to guest-controlled resource exhaustion","id":"CVE-2026-27204"},"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["1.7.2"],"package":"ebay-mcp","purl":null,"source":"GHSA-97rm-xj73-33jh"},{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["1.7.2"],"package":"ebay-mcp","purl":"pkg:npm/ebay-mcp","source":"GHSA-97rm-xj73-33jh"}],"prev":{"headline":"GetSimple CMS: Uploaded Files (feature) Arbitrary File Read Vulnerability","id":"CVE-2026-27202"},"products":["ebay-mcp"],"published":"2026-02-20","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":"2026-02-25","vendors":["YosefHayim"]},"summary":"Attackers can inject arbitrary environment variables via the token update tool, potentially leading to remote code execution or denial of service.","url":"https://insights.sbomify.com/CVE-2026-27203/"}