@siteboon/claude-code-ui is Vulnerable to Shell Command Injection in Git Routes

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-31861: 6.27% estimated exploitation activity in the next 30 days; percentile 93.59 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Shell Command Injection in User Git Config Endpoint | Field | Value | |-------|-------| | Severity | High | | CVSS 3.1 | 8.8 (High) — when chained with VULN-01 | | CWE | CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | | Attack Vector | Network | | Authentication | JWT required (bypassable via VULN-01) | | Affected Files | server/routes/user.js (lines 58-59) | Description The /api/user/git-config endpoint constructs shell commands by interpolating user-supplied gitName and gitEmail values into command strings passed to childprocess.exec(). The input is placed within double quotes and only " is escaped, but backticks ( ), $() command substitution, and \ sequences are all interpreted within double-quoted strings in bash. This allows authenticated attackers to execute arbitrary OS commands via the git configuration endpoint. Root Cause server/routes/user.js lines 58-59: Only " is escaped. However, within double-quoted bash strings, the…

Published by the source

10 Mar 2026, 23:57 UTC

Last modified by the source

13 Mar 2026, 10:56 UTC

Source last checked

26 Oct 2026, 12:43 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-7fv4-fmmc-86g2

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-7fv4-fmmc-86g2

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# Patch Next advisory brief: CVE-2026-31861

Advisory: @siteboon/claude-code-ui is Vulnerable to Shell Command Injection in Git Routes
IDs: CVE-2026-31861, GHSA-7fv4-fmmc-86g2
Record: https://patchnext.com/advisories/cve-2026-31861 (revision 3, source checked 26 Oct 2026, 12:43 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @siteboon/claude-code-ui 1.24.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @siteboon/claude-code-ui: affected <= 1.23.0; fixed in 1.24.0

## Suggested inspection (read-only)
- `npm ls @siteboon/claude-code-ui --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @siteboon/claude-code-ui.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-7fv4-fmmc-86g2 (OSV record GHSA-7fv4-fmmc-86g2 lists affected ranges: npm @siteboon/claude-code-ui >=0 <1.24.0 (fixed))
- Verified: https://github.com/advisories/GHSA-7fv4-fmmc-86g2 (GitHub-reviewed advisory GHSA-7fv4-fmmc-86g2 lists affected ranges: npm @siteboon/claude-code-ui >=0 <=1.23.0)

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