Vulnerability · Published Sep 14, 2026 · Assigned by GitHub_M
CVE-2026-59960Argos JavaScript: CI Branch Name OS Command Injection in @argos-ci/core
High 7.5
In plain English
A high-severity OS command injection in argos-javascript from argos-ci. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Argos JavaScript provides official Argos SDKs for JavaScript. Prior to Argos core package version 6.2.1, attacker-controlled CI branch or ref values from GITHUB_HEAD_REF or ARGOS_BRANCH can flow through config.branch and getMergeBaseCommitSha() when hasRemoteContentAccess is false. The gitFetch() and gitMergeBase() functions in packages/core/src/ci-environment/git.ts interpolate these values into execSync() command strings executed by /bin/sh -c, so shell metacharacters in a pull-request branch name can execute arbitrary commands with the Argos upload process privileges on the CI runner. Successful exploitation can expose CI secrets, alter build artifacts, or compromise the runner. This issue is fixed in Argos core package version 6.2.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @argos-ci/core | 6.2.1 | GHSA-4x45-gxvp-6283 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| argos-ci | argos-javascript | < 6.2.1 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/argos-ci/argos-javascript/security/advisories/GHSA-4x45-gxvp-6283 x_refsource_CONFIRM
- https://github.com/argos-ci/argos-javascript/pull/319 x_refsource_MISC
- https://github.com/argos-ci/argos-javascript/commit/8355f3af3be3f4fe361d58a688d21535cf672717 x_refsource_MISC
- https://github.com/argos-ci/argos-javascript/releases/tag/@argos-ci/core@6.2.1 x_refsource_MISC