{"answers":{"affected":"1 open source package ship an affected version, including xygeni/xygeni-action. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-31976 in the wild and no public exploit code.","fix":"Upgrade xygeni/xygeni-action to 6.4.0 or later.","what":"CVE-2026-31976 is a critical vulnerability in xygeni-action, published on 11 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-2026-31976 and fix it if it is affected.\n\nWhat it is: CVE-2026-31976 is a critical vulnerability in xygeni-action, published on 11 Mar 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-2026-31976 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- xygeni/xygeni-action (GitHub Actions): affected from 5; fixed in 6.4.0\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-2026-31976/ (Markdown: https://insights.sbomify.com/CVE-2026-31976/index.md)","id":"CVE-2026-31976","markdown":"https://insights.sbomify.com/CVE-2026-31976/index.md","name":"CVE-2026-31976","record":{"aliases":["GHSA-f8q5-h5qh-33mh"],"analysis":{"component_type":"developer_tool","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"GitHub Actions","requires_auth":"none","summary":"Attackers poisoned a GitHub Action tag to inject a backdoor, allowing arbitrary command execution on CI runners for workflows using the compromised version.","user_interaction":"not_required","vuln_class":"supply_chain"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"xygeni-action","vendor":"xygeni"}],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-506","name":"Embedded Malicious Code"}],"description":"xygeni-action is the GitHub Action for Xygeni Scanner. On March 3, 2026, an attacker with access to compromised credentials created a series of pull requests (#46, #47, #48) injecting obfuscated shell code into action.yml. The PRs were blocked by branch protection rules and never merged into the main branch. However, the attacker used the compromised GitHub App credentials to move the mutable v5 tag to point at the malicious commit (4bf1d4e19ad81a3e8d4063755ae0f482dd3baf12) from one of the unmerged PRs. This commit remained in the repository's git object store, and any workflow referencing @v5 would fetch and execute it. This is a supply chain compromise via tag poisoning. Any GitHub Actions workflow referencing xygeni/xygeni-action@v5 during the affected window (approximately March 3–10, 2026) executed a C2 implant that granted the attacker arbitrary command execution on the CI runner for up to 180 seconds per workflow run.","ecosystems":["GitHub Actions"],"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":"xygeni-action v5 tag poisoned with C2 backdoor","id":"CVE-2026-31976","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"GitHub Actions","product":null,"products":[],"type":"supply_chain","year":"2026"},"n_packages":1,"n_references":2,"next":{"headline":"motionEye: Arbitrary File Read via Path Traversal in Picture/Movie Preview Endpoint","id":"CVE-2026-31978"},"packages":[{"ecosystem":"GitHub Actions","fixed":["6.4.0"],"introduced":["5"],"last_affected":[],"package":"xygeni/xygeni-action","purl":null,"source":"GHSA-f8q5-h5qh-33mh"}],"prev":{"headline":"Cloud CLI WebSocket shell injection","id":"CVE-2026-31975"},"products":["xygeni-action"],"published":"2026-03-11","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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-03-12","vendors":["xygeni"]},"summary":"Attackers poisoned a GitHub Action tag to inject a backdoor, allowing arbitrary command execution on CI runners for workflows using the compromised version.","url":"https://insights.sbomify.com/CVE-2026-31976/"}