CVE-2026-106492Backstage: Improper preservation of access restrictions during service credential delegation
Updated under an hour ago ()
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It affects backstage and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.24%, higher than 14% of scored CVEs.
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Free account, 1 product
Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 0.17.8.
- CVSS
- 7.6 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
- Weakness (CWE)
- CWE-269, CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.24% (percentile 14)
- Assigned by
- GitHub_M
- NVD analysis
- Undergoing Analysis
- Record last updated
- Oct 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
backstage backstage backstage:backstage (from the name) | before 1.49.6; from 1.50.0-next.0, < 1.54.6 | CNA record |
@backstage backend-defaults backstage:backend_defaults (from the name) | before 0.16.1; from 0.17.0, < 0.17.8 | CNA record |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-cq7v-rfgc-5c7vx-refsource-confirm
- https://github.com/backstage/backstage/commit/40346245c53e1bf26dee56601e95c5c4ab9cc124x-refsource-misc
- https://github.com/backstage/backstage/commit/bc80ffdafbc92ff7b8c72347eace13cb8688fd33x-refsource-misc
- https://github.com/backstage/backstage/releases/tag/v1.49.6x-refsource-misc
- https://github.com/backstage/backstage/releases/tag/v1.54.6x-refsource-misc
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.