CVE-2026-106560 json
Backstage: Improper repository path validation in a Scaffolder backend module
published last mo. modified 24d ago also GHSA-2cmg-v53w-8xfp , EUVD-2026-94373
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm @backstage/plugin-scaffolder-backend-module-confluence-to-markdown 0.3.25
- linuxfoundation backstage/plugin-scaffolder-backend-module-confluence-to-markdown 0.3.25
- linuxfoundation backstage 1.54.6
Is CVE-2026-106560 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last mo.
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @backstage/plugin-scaffolder-backend-module-confluence-to-markdown | <0.3.25 |
0.3.25 |
Affected products
- backstage backstage
- @backstage plugin-scaffolder-backend-module-confluence-to-markdown
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/backstage/backstage/commit/5f0000c1d0af05571e357926b3fa33a453337ff0
web, patch
-
github.com
/backstage/backstage/security/advisories/GHSA-2cmg-v53w-8xfp
web, mitigation, patch, vendor-advisory
-
github.com
/backstage/backstage/releases/tag/v1.54.6
web, patch, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-106560
advisory
-
github.com
/backstage/backstage
package
Sources
- CVE List CVE-2026-106560
- GitHub Advisory GHSA-2cmg-v53w-8xfp
- NVD CVE-2026-106560
Fencer Intel 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.