CVE-2026-106486 Backstage @backstage/plugin-scaffolder-backend-module-bitbucket - Path Traversal

Backstage @backstage/plugin-scaffolder-backend-module-bitbucket-cloud < 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server < 0.2.25 contain a path traversal caused by insufficient validation of filesystem paths in Bitbucket pull-request Scaffolder actions, letting authenticated users affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability.

CVSS base score 8.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.33% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
Information Disclosure, Data Tampering, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
6 October 2026
Updated
15 October 2026
Weakness
CWE-22

Vendor fix

Update to @backstage/plugin-scaffolder-backend-module-bitbucket-cloud 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server 0.2.25 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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