CVE-2026-106492 Backstage @backstage/backend-defaults - Broken Access Control

Backstage @backstage/backend-defaults < 0.16.1 and < 0.17.8 contains a broken access control caused by improper preservation of access restrictions during service credential delegation, letting external services bypass restrictions and perform unauthorized operations, exploit requires configured service credentials with access restrictions.

CVSS base score 7.6 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.24% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
Published
6 October 2026
Updated
15 October 2026
Weakness
CWE-269

Vendor fix

Update to versions 0.16.1 and 0.17.8 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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