MeltanoHub vulnerable to command injection in the `test_dispatcher` GitHub Actions workflow

published 2026-07-21 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-46420

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits: 0; none known

MeltanoHub is the source code for hub.meltano.com, the central place for Meltano plugins. Versions of the repo prior to commit 923820de8f64d753951fbbd54f7282a3d5f75173 were vulnerable to exfiltration of `GITHUB_TOKEN` with write permissions to the repository. The vulnerable workflow used pull_request_target, which runs in the context of the base repository with access to secrets. Commit 923820de8f64d753951fbbd54f7282a3d5f75173 fixes the issue. No known workarounds are available.

Patch / fix

links 4

github.com/meltano/hub@923820d commit
github.com/meltano/hub#2247 pull request
github.com/meltano/hub#2249 pull request
github.com/meltano/hub#2251 pull request

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 3 mo ago (2026-07-22)

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

meltano hub

Classification

Weakness

CWE-77 Improper Neutralization of Special Elements used in a Command
CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine

References

Sources

CVE List CVE-2026-47690
NVD CVE-2026-47690

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary