{"id":"CVE-2024-52587","aliases":["EUVD-2024-3251","GHSA-g85v-wf27-67xc"],"status":"published","title":"Harden-Runner has command injection weaknesses in `setup.ts` and `arc-runner.ts`","description":"StepSecurity's Harden-Runner provides network egress filtering and runtime security for GitHub-hosted and self-hosted runners. Versions of step-security/harden-runner prior to v2.10.2 contain multiple command injection weaknesses via environment variables that could potentially be exploited under specific conditions. However, due to the current execution order of pre-steps in GitHub Actions and the placement of harden-runner as the first step in a job, the likelihood of exploitation is low as the Harden-Runner action reads the environment variable during the pre-step stage. There are no known exploits at this time. Version 2.10.2 contains a patch.","severity":{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.02761,"percentile":0.86473,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-78"],"published":"2024-11-18T22:03:15Z","modified":"2026-10-28T02:30:38Z","fixes":[{"ecosystem":"GitHub Actions","package":"step-security/harden-runner","fixed_in":["2.10.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"GitHub Actions","package":"step-security/harden-runner","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.2"}]}]},{"source":"osv","ecosystem":"GitHub Actions","package":"step-security/harden-runner","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.2"}]}]}],"products":[{"vendor":"step-security","product":"harden-runner"},{"vendor":"step_security","product":"harden_runner"}],"references":[{"url":"https://github.com/step-security/harden-runner/security/advisories/GHSA-g85v-wf27-67xc","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/step-security/harden-runner/commit/0080882f6c36860b6ba35c610c98ce87d4e2f26f","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L40-L44","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L53","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L57","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L61","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/setup.ts#L169","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/setup.ts#L229","tags":["x_refsource_MISC","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-52587","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-g85v-wf27-67xc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/52xxx/CVE-2024-52587.json","tags":["advisory"]},{"url":"https://github.com/step-security/harden-runner","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2024-52587","title":"Harden-Runner has command injection weaknesses in `setup.ts` and `arc-runner.ts`","description":"StepSecurity's Harden-Runner provides network egress filtering and runtime security for GitHub-hosted and self-hosted runners. Versions of step-security/harden-runner prior to v2.10.2 contain multiple command injection weaknesses via environment variables that could potentially be exploited under specific conditions. However, due to the current execution order of pre-steps in GitHub Actions and the placement of harden-runner as the first step in a job, the likelihood of exploitation is low as the Harden-Runner action reads the environment variable during the pre-step stage. There are no known exploits at this time. Version 2.10.2 contains a patch.","status":"published","published":"2024-11-18T22:03:15.657Z","modified":"2024-11-19T14:38:08.418Z","cvss":[{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U","level":"low","assessor":"cna"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:34:03.333404Z"}],"euvd":[{"id":"EUVD-2024-3251","description":"StepSecurity's Harden-Runner provides network egress filtering and runtime security for GitHub-hosted and self-hosted runners. Versions of step-security/harden-runner prior to v2.10.2 contain multiple command injection weaknesses via environment variables that could potentially be exploited under specific conditions. However, due to the current execution order of pre-steps in GitHub Actions and the placement of harden-runner as the first step in a job, the likelihood of exploitation is low as the Harden-Runner action reads the environment variable during the pre-step stage. There are no known exploits at this time. Version 2.10.2 contains a patch.","status":"published","published":"2024-11-18T22:03:15Z","modified":"2024-11-19T14:38:08Z","cvss":[{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U","level":"low"}],"updated_at":"2026-11-03T00:04:56.531722Z"}],"ghsa":[{"id":"GHSA-g85v-wf27-67xc","title":"Harden-Runner has a command injection weaknesses in `setup.ts` and `arc-runner.ts`","description":"### Summary\n\nVersions of step-security/harden-runner prior to v2.10.2 contain multiple command injection weaknesses via environment variables that could potentially be exploited under specific conditions. However, due to the current execution order of pre-steps in GitHub Actions and the placement of harden-runner as the first step in a job, the likelihood of exploitation is low as the Harden-Runner action reads the environment variable during the pre-step stage. There are no known exploits at this time. \n\n### Details\n\n1. setup.ts:169 [1]  performs `execSync` with a command that gets\ninvoked after interpretation by the shell. This command includes an\ninterpolated `process.env.USER` variable, which an attacker could\nmodify (without actually creating a new user) to inject arbitrary\nshell expressions into this `execSync`. This may or may not be likely\nin practice, but I believe the hygienic way to perform the underlying\noperation is to use `execFileSync` or similar and bypass the\nunderlying shell evaluation.\n\n2. setup.ts:229 [2] has a nearly identical `execSync` to (1) above,\nbut with `$USER` for shell-level interpolation rather than string\ninterpolation. However, this is still injectable and would be best\nreplaced by an `execFileSync`, per above.\n\n3. arc-runner:40-44 [3] has an `execSync` with multiple string\ninterpolations. Most of these do not appear immediately injectible\n(since they appear to come from presumed trusted API responses), but\nthe expansion of `getRunnerTempDir()` may be injectable due to its\ndependence on potentially attacker-controllable environment variables\n(e.g. `RUNNER_TEMP`). The underlying operation appears to be a trivial\nfile copy, so this entire subprocess should in theory be replaceable\nwith ordinary NodeJS `fs` API calls instead.\n\n4. arc-runner:53 [4] demonstrates the same weakness, and has the same\nresolution as (3).\n\n5. arc-runner:57 demonstrates the same weakness as (3) and (4), and\nhas the same resolution.\n\n6. arc-runner:61 demonstrates the same weakness as (3), (4), and (5),\nand has the same resolution.\n\n\n[1]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/setup.ts#L169\n\n[2]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/setup.ts#L229\n\n[3]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L40-L44\n\n[4]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L53\n\n[5]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L57\n\n[6]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L61","status":"published","published":"2024-11-18T23:48:26Z","modified":"2024-11-19T20:50:11Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:38:21.777721Z"}],"nvd":[{"id":"CVE-2024-52587","description":"StepSecurity's Harden-Runner provides network egress filtering and runtime security for GitHub-hosted and self-hosted runners. Versions of step-security/harden-runner prior to v2.10.2 contain multiple command injection weaknesses via environment variables that could potentially be exploited under specific conditions. However, due to the current execution order of pre-steps in GitHub Actions and the placement of harden-runner as the first step in a job, the likelihood of exploitation is low as the Harden-Runner action reads the environment variable during the pre-step stage. There are no known exploits at this time. Version 2.10.2 contains a patch.","status":"published","published":"2024-11-18T22:15:09.557Z","modified":"2026-06-17T08:07:30.04Z","cvss":[{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:10:37.632431Z"}],"osv":[{"id":"CVE-2024-52587","title":"Harden-Runner has command injection weaknesses in `setup.ts` and `arc-runner.ts`","description":"StepSecurity's Harden-Runner provides network egress filtering and runtime security for GitHub-hosted and self-hosted runners. Versions of step-security/harden-runner prior to v2.10.2 contain multiple command injection weaknesses via environment variables that could potentially be exploited under specific conditions. However, due to the current execution order of pre-steps in GitHub Actions and the placement of harden-runner as the first step in a job, the likelihood of exploitation is low as the Harden-Runner action reads the environment variable during the pre-step stage. There are no known exploits at this time. Version 2.10.2 contains a patch.","status":"published","published":"2024-11-18T22:03:15.657Z","modified":"2026-10-28T02:30:38.45249321Z","cvss":[{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U","level":"low"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:44:44.032344Z"},{"id":"GHSA-g85v-wf27-67xc","title":"Harden-Runner has a command injection weaknesses in `setup.ts` and `arc-runner.ts`","description":"### Summary\n\nVersions of step-security/harden-runner prior to v2.10.2 contain multiple command injection weaknesses via environment variables that could potentially be exploited under specific conditions. However, due to the current execution order of pre-steps in GitHub Actions and the placement of harden-runner as the first step in a job, the likelihood of exploitation is low as the Harden-Runner action reads the environment variable during the pre-step stage. There are no known exploits at this time. \n\n### Details\n\n1. setup.ts:169 [1]  performs `execSync` with a command that gets\ninvoked after interpretation by the shell. This command includes an\ninterpolated `process.env.USER` variable, which an attacker could\nmodify (without actually creating a new user) to inject arbitrary\nshell expressions into this `execSync`. This may or may not be likely\nin practice, but I believe the hygienic way to perform the underlying\noperation is to use `execFileSync` or similar and bypass the\nunderlying shell evaluation.\n\n2. setup.ts:229 [2] has a nearly identical `execSync` to (1) above,\nbut with `$USER` for shell-level interpolation rather than string\ninterpolation. However, this is still injectable and would be best\nreplaced by an `execFileSync`, per above.\n\n3. arc-runner:40-44 [3] has an `execSync` with multiple string\ninterpolations. Most of these do not appear immediately injectible\n(since they appear to come from presumed trusted API responses), but\nthe expansion of `getRunnerTempDir()` may be injectable due to its\ndependence on potentially attacker-controllable environment variables\n(e.g. `RUNNER_TEMP`). The underlying operation appears to be a trivial\nfile copy, so this entire subprocess should in theory be replaceable\nwith ordinary NodeJS `fs` API calls instead.\n\n4. arc-runner:53 [4] demonstrates the same weakness, and has the same\nresolution as (3).\n\n5. arc-runner:57 demonstrates the same weakness as (3) and (4), and\nhas the same resolution.\n\n6. arc-runner:61 demonstrates the same weakness as (3), (4), and (5),\nand has the same resolution.\n\n\n[1]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/setup.ts#L169\n\n[2]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/setup.ts#L229\n\n[3]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L40-L44\n\n[4]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L53\n\n[5]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L57\n\n[6]: https://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L61","status":"published","published":"2024-11-18T23:48:26Z","modified":"2024-11-19T20:50:10Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:46:47.472172Z"}]}}