CVE-2025-66626: Github.com/argoproj/argo workflows/v3 Remote Code Execution Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xrqc-7xgx-c9vh",
  "modified" : "2025-12-20T05:44:32Z",
  "published" : "2025-12-09T17:17:22Z",
  "aliases" : [ "CVE-2025-66626" ],
  "summary" : " RCE via ZipSlip and symbolic links in argoproj/argo-workflows",
  "details" : "### Summary\nThe patch deployed against CVE-2025-62156 is ineffective against malicious archives containing symbolic links.\n\n### Details\nThe untar code that handles symbolic links in archives is unsafe. Concretely, the computation of the link's target and the subsequent check are flawed: \nhttps://github.com/argoproj/argo-workflows/blob/5291e0b01f94ba864f96f795bb500f2cfc5ad799/workflow/executor/executor.go#L1034-L1037\n\n### PoC\n1. Create a malicious archive containing two files: a symbolik link with path \"./work/foo\" and target \"/etc\", and a normal text file with path \"./work/foo/hostname\".\n2. Deploy a workflow like the one in https://github.com/argoproj/argo-workflows/security/advisories/GHSA-p84v-gxvw-73pf with the malicious archive mounted at /work/tmp.\n3. Submit the workflow and wait for its execution. \n4. Connect to the corresponding pod and observe that the file \"/etc/hostname\" was altered by the untar operation performed on the malicious archive. The attacker can hence alter arbitrary files in this way. \n\n### Impact\nThe attacker can overwrite the file /var/run/argo/argoexec with a script of their choice, which will be executed at the pod's start.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/argoproj/argo-workflows/v3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.7.0"
      }, {
        "fixed" : "3.7.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/argoproj/argo-workflows/v3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.6.14"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/argoproj/argo-workflows"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.5.3-rc4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-xrqc-7xgx-c9vh"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-66626"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/argoproj/argo-workflows/commit/6b92af23f35aed4d4de8b04adcaf19d68f006de1"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-p84v-gxvw-73pf"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/argoproj/argo-workflows"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/argoproj/argo-workflows/blob/5291e0b01f94ba864f96f795bb500f2cfc5ad799/workflow/executor/executor.go#L1034-L1037"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-23", "CWE-59", "CWE-78" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-12-09T17:17:22Z",
    "nvd_published_at" : "2025-12-09T21:16:00Z"
  }
}