High 7.1Published Oct 7, 2026

CVE-2026-106560Backstage: Improper repository path validation in a Scaffolder backend module

Updated under an hour ago (2026-10-19 07:23 UTC)

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It affects backstage and 3 other products. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.33%, higher than 24% of scored CVEs.

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Every CVE for backstage

Exploited in the last 30 days

Backstage is an open framework for building developer portals. Prior to 0.3.25, the @backstage/plugin-scaffolder-backend-module-confluence-to-markdown package is affected by improper repository path validation in a scaffolder backend module. An authenticated user who can execute an affected template and control its repository file location may cause generated content to be written outside the task workspace, within locations writable by the Backstage backend process. This issue is fixed in version 0.3.25.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.33% (percentile 24)
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

backstage backstage backstage:backstage (from the name)	before 1.54.6	CNA record
@backstage plugin-scaffolder-backend-module-confluence-to-markdown backstage:plugin_scaffolder_backend_module_confluence_to_markdown (from the name)	before 0.3.25	CNA record
linuxfoundation backstage/plugin-scaffolder-backend-module-confluence-to-markdown linuxfoundation:backstage/plugin-scaffolder-backend-module-confluence-to-markdown	before 0.3.25	NVD
linuxfoundation backstage linuxfoundation:backstage	before 1.54.6	NVD

References

https://github.com/backstage/backstage/security/advisories/GHSA-2cmg-v53w-8xfpx-refsource-confirm, mitigation, patch, vendor-advisory
https://github.com/backstage/backstage/commit/5f0000c1d0af05571e357926b3fa33a453337ff0x-refsource-misc, patch
https://github.com/backstage/backstage/releases/tag/v1.54.6x-refsource-misc, patch, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.