CVE-2026-106560Backstage: Improper repository path validation in a Scaffolder backend module
- 7.1HighCVSS base score
- 0.31%Exploitation in 30 daysEPSS · top 75% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By GitHub_M
- 1 day later
· 1 day later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
| NVDNVD · Analyzed | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.31% · top 75% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
- affected < 1.54.6
@backstage · plugin-scaffolder-backend-module-confluence-to-markdown
- affected < 0.3.25
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npm@backstage/plugin-scaffolder-backend-module-confluence-to-markdownGHSA-2cmg-v53w-8xfp (opens in a new tab)
References
References3
- https://github.com/backstage/backstage/security/advisories/GHSA-2cmg-v53w-8xfp (opens in a new tab)x_refsource_CONFIRM
- https://github.com/backstage/backstage/commit/5f0000c1d0af05571e357926b3fa33a453337ff0 (opens in a new tab)x_refsource_MISC
- https://github.com/backstage/backstage/releases/tag/v1.54.6 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-94373 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-2cmg-v53w-8xfp (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-106560)Record last updated .