What’s Vulnerable › Vulnerabilities

CVE-2025-66626: argoproj/argo-workflows is vulnerable to RCE via ZipSlip and symbolic links

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-12-09 · updated 2026-10-14
• Weakness: CWE-23

Description

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Versions 3.6.13 and below and versions 3.7.0 through 3.7.4, contain unsafe untar code that handles symbolic links in archives. Concretely, the computation of a link's target and the subsequent check are flawed. An attacker can overwrite the file /var/run/argo/argoexec with a script of their choice, which would be executed at the pod's start. The patch deployed against CVE-2025-62156 is ineffective against malicious archives containing symbolic links. This issue is fixed in versions 3.6.14 and 3.7.5.

Affected products

• argoproj argo-workflows: before 3.6.14; from 3.7.0 before 3.7.5 — fixed in 3.6.14, 3.7.5

How to fix

Upgrade to a fixed version: argoproj argo-workflows 3.6.14, 3.7.5. Check the vendor advisory for mitigations.

References

• https://github.com/advisories/GHSA-p84v-gxvw-73pf
• https://github.com/argoproj/argo-workflows/blob/5291e0b01f94ba864f96f795bb500f2cfc5ad799/workflow/executor/executor.go#L1034-L1037
• https://github.com/argoproj/argo-workflows/commit/6b92af23f35aed4d4de8b04adcaf19d68f006de1
• https://github.com/argoproj/argo-workflows/security/advisories/GHSA-xrqc-7xgx-c9vh
• https://github.com/advisories/GHSA-p84v-gxvw-73pf
• https://github.com/argoproj/argo-workflows/security/advisories/GHSA-xrqc-7xgx-c9vh

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