CVE-2026-47690Public exploitNetwork attack vector

Repository write-token theft via unsanitized filenames

Published Jul 21, 2026 · Updated Jul 21, 2026

Command injection in Meltano Hub before 923820d allows remote attackers to steal a write-scoped repository token through a pull request. The get_changed_files job in .github/workflows/test_dispatcher.yml inserts attacker-controlled filenames directly into a Bash command, so $(...) syntax executes on the runner. Any GitHub user can trigger the pull_request_target workflow from a fork, gaining runner code execution and access to the write-scoped GITHUB_TOKEN.

CVSS severity7.5
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Meltano Hub before 923820d allows remote attackers to steal a write-scoped repository token through a pull request. The get_changed_files job in .github/workflows/test_dispatcher.yml inserts attacker-controlled filenames directly into a Bash command, so $(...) syntax executes on the runner. Any GitHub user can trigger the pull_request_target workflow from a fork, gaining runner code execution and access to the write-scoped GITHUB_TOKEN.

The record

CVE
CVE-2026-47690
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
Meltano
Product
Meltano Hub
Classifications
CWE-1336, CWE-77, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 923820de8f64d753951fbbd54f7282a3d5f75173

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Meltano · Meltano Hubversion=< 923820de8f64d753951fbbd54f7282a3d5f75173

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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