{"answers":{"affected":"1 open source package ship an affected version, including njzjz/wenxian. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34243 exists.","fix":"No fix has been published for CVE-2026-34243 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-34243 is a critical command injection vulnerability in njzjz wenxian, published on 31 Mar 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-2026-34243 and fix it if it is affected.\n\nWhat it is: CVE-2026-34243 is a critical command injection vulnerability in njzjz wenxian, published on 31 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34243 exists.\n\nAffected packages and fixed versions:\n- njzjz/wenxian (GitHub Actions): affected all versions up to 0.3.1; 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-2026-34243/ (Markdown: https://insights.sbomify.com/CVE-2026-34243/index.md)","id":"CVE-2026-34243","markdown":"https://insights.sbomify.com/CVE-2026-34243/index.md","name":"CVE-2026-34243","record":{"aliases":["GHSA-r4fj-r33x-8v88"],"analysis":{"component_type":"developer_tool","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"GitHub Actions workflow","requires_auth":"none","summary":"Attackers can execute arbitrary code on CI runners by injecting commands into issue comments processed by the wenxian tool.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"wenxian","vendor":"njzjz"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"},{"id":"CWE-77","name":"Improper Neutralization of Special Elements used in a Command"}],"description":"wenxian is a tool to generate BIBTEX files from given identifiers (DOI, PMID, arXiv ID, or paper title). In versions 0.3.1 and prior, a GitHub Actions workflow uses untrusted user input from issue_comment.body directly inside a shell command, allowing potential command injection and arbitrary code execution on the runner. At time of publication, there are no publicly available patches.","ecosystems":["GitHub Actions"],"exploits":{"exploitdb":0,"first_seen":"2026-09-05","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-09-05T00:47:08Z","kind":"github_poc","ref":"https://github.com/pvharmo2/gha-lab-85f022290a","stars":0,"title":"Research lab reproduction of CVE-2026-34243 (GHSA-r4fj-r33x-8v88): command injection via issue_comment.body in .github/workflows/comment.yaml — snapshot of njzjz/wenxian@ca4e04de86aa970c0e3cb1c7f2bd103d339fbe51"}],"tier":"weaponised"},"has_fix":false,"headline":"wenxian: Command Injection in GitHub Actions Workflow via `issue_comment.body`","id":"CVE-2026-34243","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"GitHub Actions","product":null,"products":[],"type":"command_injection","year":"2026"},"n_packages":1,"n_references":1,"next":{"headline":"Weblate: SSRF via Project-Level Machinery Configuration","id":"CVE-2026-34244"},"packages":[{"ecosystem":"GitHub Actions","fixed":[],"introduced":["0"],"last_affected":["0.3.1"],"package":"njzjz/wenxian","purl":null,"source":"GHSA-r4fj-r33x-8v88"}],"prev":{"headline":"Weblate: Arbitrary File Read via Symlink","id":"CVE-2026-34242"},"products":["wenxian"],"published":"2026-03-31","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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-02","vendors":["njzjz"]},"summary":"Attackers can execute arbitrary code on CI runners by injecting commands into issue comments processed by the wenxian tool.","url":"https://insights.sbomify.com/CVE-2026-34243/"}