{"id":"CVE-2021-37914","aliases":["BIT-argo-workflows-2021-37914","EUVD-2021-1738","GHSA-h563-xh25-x54q","GO-2022-0928"],"status":"published","title":"Workflow re-write vulnerability using input parameter","description":"In Argo Workflows through 3.1.3, if EXPRESSION_TEMPLATES is enabled and untrusted users are allowed to specify input parameters when running workflows, an attacker may be able to disrupt a workflow because expression template output is evaluated.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00963,"percentile":0.62118,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2021-08-02T23:17:45Z","modified":"2026-10-20T10:54:53Z","fixes":[{"ecosystem":"Go","package":"github.com/argoproj/argo-workflows/v3","fixed_in":["3.1.6"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"argo-workflows","fixed_in":["3.1.4"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/argoproj/argo-workflows/v3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.1.0"},{"fixed":"3.1.6"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"argo-workflows","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.4"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/argoproj/argo-workflows/v3","ranges":[{"type":"SEMVER","events":[{"introduced":"3.1.0"},{"fixed":"3.1.6"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/argoproj/argo-workflows","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/argoproj/argo-workflows/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/argoproj/argo-workflows/v3","ranges":[{"type":"SEMVER","events":[{"introduced":"3.1.0"},{"fixed":"3.1.6"}]}]}],"products":[{"vendor":"argoproj","product":"argo_workflows"}],"references":[{"url":"https://github.com/argoproj/argo-workflows/issues/6441","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","web","report"]},{"url":"https://github.com/argoproj/argo-workflows/pull/6442","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Third Party Advisory","web","fix"]},{"url":"https://github.com/argoproj/argo-workflows/security/advisories/GHSA-h563-xh25-x54q","tags":["web","advisory"]},{"url":"https://github.com/argoproj/argo-workflows/pull/6285","tags":["web","fix"]},{"url":"https://github.com/argoproj/argo-workflows/commit/2a2ecc916925642fd8cb1efd026588e6828f82e1","tags":["web","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-37914","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-h563-xh25-x54q"},{"url":"github.com/argoproj/argo-workflows/v3","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-37914","description":"In Argo Workflows through 3.1.3, if EXPRESSION_TEMPLATES is enabled and untrusted users are allowed to specify input parameters when running workflows, an attacker may be able to disrupt a workflow because expression template output is evaluated.","status":"published","published":"2021-08-02T23:17:45Z","modified":"2024-08-04T01:30:09.17Z","updated_at":"2026-11-02T14:32:58.359368Z"}],"euvd":[{"id":"EUVD-2021-1738","description":"In Argo Workflows through 3.1.3, if EXPRESSION_TEMPLATES is enabled and untrusted users are allowed to specify input parameters when running workflows, an attacker may be able to disrupt a workflow because expression template output is evaluated.","status":"published","published":"2021-08-02T23:17:45Z","modified":"2024-08-04T01:30:09Z","updated_at":"2026-11-03T03:24:26.118239Z"}],"ghsa":[{"id":"GHSA-h563-xh25-x54q","title":"Workflow re-write vulnerability using input parameter","description":"### Impact\n\n* Allow end-users to set input parameters, but otherwise expect workflows to be secure.\n\n### Patches\n\nNot yet.\n\n### Workarounds\n\n* Set `EXPRESSION_TEMPLATES=false` for the workflow controller\n\n\n### References\n\n* https://github.com/argoproj/argo-workflows/issues/6441\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [example link to repo](http://example.com)\n* Email us at [example email address](mailto:example@example.com)\n","status":"published","published":"2021-08-09T20:37:50Z","modified":"2023-02-01T05:05:55Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:36:36.66596Z"}],"nvd":[{"id":"CVE-2021-37914","description":"In Argo Workflows through 3.1.3, if EXPRESSION_TEMPLATES is enabled and untrusted users are allowed to specify input parameters when running workflows, an attacker may be able to disrupt a workflow because expression template output is evaluated.","status":"published","published":"2021-08-03T00:15:08.607Z","modified":"2026-06-17T04:01:14.51Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"primary"},{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:06:56.562207Z"}],"osv":[{"id":"CVE-2021-37914","description":"In Argo Workflows through 3.1.3, if EXPRESSION_TEMPLATES is enabled and untrusted users are allowed to specify input parameters when running workflows, an attacker may be able to disrupt a workflow because expression template output is evaluated.","status":"published","published":"2021-08-03T00:15:08.607Z","modified":"2026-10-20T10:54:53.706793026Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:44:20.434873Z"},{"id":"BIT-argo-workflows-2021-37914","description":"In Argo Workflows through 3.1.3, if EXPRESSION_TEMPLATES is enabled and untrusted users are allowed to specify input parameters when running workflows, an attacker may be able to disrupt a workflow because expression template output is evaluated.","status":"published","published":"2024-03-06T10:50:47.003Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:28.267217Z"},{"id":"GHSA-h563-xh25-x54q","title":"Workflow re-write vulnerability using input parameter","description":"### Impact\n\n* Allow end-users to set input parameters, but otherwise expect workflows to be secure.\n\n### Patches\n\nNot yet.\n\n### Workarounds\n\n* Set `EXPRESSION_TEMPLATES=false` for the workflow controller\n\n\n### References\n\n* https://github.com/argoproj/argo-workflows/issues/6441\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [example link to repo](http://example.com)\n* Email us at [example email address](mailto:example@example.com)\n","status":"published","published":"2021-08-09T20:37:50Z","modified":"2024-08-21T16:28:50.154419Z","cwes":["CWE-20"],"updated_at":"2026-11-02T15:46:48.546324Z"},{"id":"GO-2022-0928","title":"Workflow re-write vulnerability using input parameter in github.com/argoproj/argo-workflows","description":"Workflow re-write vulnerability using input parameter in github.com/argoproj/argo-workflows","status":"published","published":"2024-08-21T16:03:21Z","modified":"2026-03-03T04:51:03.486461Z","updated_at":"2026-11-02T15:47:00.918515Z"}]}}