High 7.6Published Oct 6, 2026

CVE-2026-106492Backstage: Improper preservation of access restrictions during service credential delegation

Updated under an hour ago (Oct 28, 2026, 6:00 AM ET)

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It affects backstage and 3 other products. 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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Exploited in the last 30 days

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: Analyzed
Record last updated: Oct 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

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
linuxfoundation backstage/backend-defaults linuxfoundation:backstage/backend-defaults	before 0.16.1; from 0.17.0 before 0.17.8	NVD
linuxfoundation backstage linuxfoundation:backstage	before 1.49.6; from 1.50.0 before 1.54.6	NVD

References

References

https://github.com/backstage/backstage/security/advisories/GHSA-cq7v-rfgc-5c7v	x-refsource-confirm, mitigation, vendor-advisory
https://github.com/backstage/backstage/commit/40346245c53e1bf26dee56601e95c5c4ab9cc124	x-refsource-misc, patch
https://github.com/backstage/backstage/commit/bc80ffdafbc92ff7b8c72347eace13cb8688fd33	x-refsource-misc, patch
https://github.com/backstage/backstage/releases/tag/v1.49.6	x-refsource-misc, patch, release-notes
https://github.com/backstage/backstage/releases/tag/v1.54.6	x-refsource-misc, patch, release-notes

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.