{"schema":"threatline.record/2","record":{"id":"GHSA-w2vw-w76x-qr89","aliases":["GHSA-w2vw-w76x-qr89"],"summary":"Nx: OS command injection via git revisions and remote refs","details":"## Summary\n\nNx core builds several `git` invocations as shell command strings with untrusted values interpolated into them, so a value that should be a git revision or ref is parsed by `/bin/sh` instead. Two entry points are reachable by an attacker: `affected` commands, where `defaultBase` / `affected.defaultBase` from `nx.json` (and the `NX_BASE` / `NX_HEAD` environment variables) reach `git merge-base` and `git diff`; and `nx import`, where a branch name advertised by a remote repository reaches `git fetch`, `git checkout`, and `git config`. In both cases an attacker who controls a repository — or who opens a pull request against one — gets arbitrary command execution on the machine of anyone who runs an ordinary Nx command against it, including CI runners.\n\nThe `affected` path is the more serious of the two. `nx affected` and `nx show projects --affected` run constantly in CI, so a pull request that changes nothing but `nx.json` is enough to execute code on the runner with whatever credentials that job holds.\n\n## Severity\n\nExploitable by anyone who controls repository content — a fork's pull request, or a repository the victim clones — that the victim then runs an ordinary `nx affected` or `nx import` against; no access to the victim's machine is required. We have no evidence of exploitation in the wild.\n\n## Affected & Patched Versions\n\n| Package | Vulnerable | Patched |\n| --- | --- | --- |\n| `nx` | `>= 14.0.0, < 22.7.8`; `>= 23.0.0, < 23.1.1` | `22.7.8`, `23.1.1` |\n\nTreat every version below the patched ones as affected.\n\n## Remediation\n\nUpgrade to **22.7.8** (22.x line) or **23.1.1** (23.x line) or later:\n\n```\nnx migrate 23.1.1\n```\n\nThe fix is a drop-in — no configuration changes are required. If you cannot upgrade, treat `nx.json` from untrusted sources as executable content, do not run `affected` commands against pull requests you have not reviewed, and do not run `nx import` against repositories you do not trust.\n\n## Details\n\n### `affected` commands\n\nNx computes the merge base and the changed-file set by building `git merge-base` and `git diff` command lines as strings and running them through a shell. The base and head revisions in those strings come from `nx.json`'s `defaultBase` / `affected.defaultBase` or from the `NX_BASE` / `NX_HEAD` environment variables, and a related code path reads file contents with `git show <revision>:<path>` the same way. Because a shell parses the whole line, a revision value containing shell syntax is executed rather than passed to `git`.\n\nThe revisions are wrapped in double quotes, which looks protective but is not: POSIX shells still perform command substitution inside double quotes, so a value of `$(…)` runs without needing to break out of the quotes.\n\n### `nx import`\n\nThe `GitRepository` helper runs every git operation — `fetch`, `checkout`, `reset`, `config`, and others — by interpolating its arguments into a shell command string. The untrusted argument is a branch name: `nx import` lists the branches a remote advertises, offers them to the user to choose from, and feeds the chosen name back into those commands. A hostile repository controls the names of its own branches, so it controls the command that runs when one is selected.\n\n\n## Credits\n\n- **Arkadiusz Marta** (RE:SOURCE) — Reporter","categories":["Libraries & packages"],"product":"nx","vendor":"","ecosystem":"npm","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-w2vw-w76x-qr89","source_modified_at":"2026-10-05T23:29:07Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"nx"},"range":">= 14.0.0, < 22.7.8"},{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-w2vw-w76x-qr89","source_modified_at":"2026-10-05T23:29:07Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"nx"},"range":">= 23.0.0, < 23.1.1"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-w2vw-w76x-qr89","source_modified_at":"2026-10-05T23:45:07.420845004Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"nx","ecosystem":"npm","purl":"pkg:npm/nx"},"ranges":[{"type":"SEMVER","events":[{"introduced":"14.0.0"},{"fixed":"22.7.8"}]}],"versions":[]},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-w2vw-w76x-qr89","source_modified_at":"2026-10-05T23:45:07.420845004Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"nx","ecosystem":"npm","purl":"pkg:npm/nx"},"ranges":[{"type":"SEMVER","events":[{"introduced":"23.0.0"},{"fixed":"23.1.1"}]}],"versions":[]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-w2vw-w76x-qr89","source_modified_at":"2026-10-05T23:29:07Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"nx"},"version":"22.7.8"},{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-w2vw-w76x-qr89","source_modified_at":"2026-10-05T23:29:07Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"nx"},"version":"23.1.1"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-w2vw-w76x-qr89","source_modified_at":"2026-10-05T23:45:07.420845004Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"nx","ecosystem":"npm","purl":"pkg:npm/nx"},"version":"22.7.8"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-w2vw-w76x-qr89","source_modified_at":"2026-10-05T23:45:07.420845004Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"nx","ecosystem":"npm","purl":"pkg:npm/nx"},"version":"23.1.1"}],"cvss":8.5,"severity":"High","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-05T23:29:06Z","modified_at":"2026-10-05T23:45:07.420845004Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-w2vw-w76x-qr89","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-05T23:29:07Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-w2vw-w76x-qr89","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-05T23:45:07.420845004Z"}],"sources":["GitHub Advisory Database","OSV"],"references":[{"url":"https://github.com/nrwl/nx/security/advisories/GHSA-w2vw-w76x-qr89","source":"GitHub Advisory Database"},{"url":"https://github.com/nrwl/nx/pull/36348","source":"GitHub Advisory Database"},{"url":"https://github.com/nrwl/nx/pull/36379","source":"GitHub Advisory Database"},{"url":"https://github.com/nrwl/nx/commit/11ab38573478172109bb5306cb30ca4af246caf0","source":"GitHub Advisory Database"},{"url":"https://github.com/nrwl/nx/commit/4159295a037fdbd8e7f44a33a19d85ab3792415b","source":"GitHub Advisory Database"},{"url":"https://github.com/nrwl/nx/commit/9ce184a04d2098a4797c8b0d6877ee079b751abf","source":"GitHub Advisory Database"},{"url":"https://github.com/nrwl/nx/commit/c12850ce7b364db08e325c13541641d754db7123","source":"GitHub Advisory Database"},{"url":"https://github.com/nrwl/nx/commit/cd9b3c068e17adc9c1722b35b9ca962b98542c20","source":"GitHub Advisory Database"},{"url":"https://github.com/nrwl/nx/commit/cf996496bbad727362d48292b50fafc8c3665847","source":"GitHub Advisory Database"},{"url":"https://github.com/nrwl/nx/releases/tag/22.7.8","source":"GitHub Advisory Database"},{"url":"https://github.com/nrwl/nx/releases/tag/23.1.1","source":"GitHub Advisory Database"},{"url":"https://github.com/advisories/GHSA-w2vw-w76x-qr89","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-05T23:45:07.420845004Z","content_hash":"917dc8dbb1e083a11aae87b1c98a82f42431404035866b17070ca49d538c6485"}}