Low 3.1Published Oct 6, 2026

CVE-2026-106496Backstage: Inconsistent enforcement of allowed location types during catalog processing

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects backstage and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

Backstage is an open framework for building developer portals. Prior to 3.9.1, the @backstage/plugin-catalog-backend package is affected by inconsistent enforcement of allowed location types during catalog processing. Under certain configurations, the catalog backend could process location types that were not intended to be allowed, potentially leading to unintended file access on the backend host. This issue is fixed in version 3.9.1.

CVSS: 3.1 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-22, CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

backstage backstage backstage:backstage (from the name)	before 1.54.6	CNA record
@backstage plugin-catalog-backend backstage:plugin_catalog_backend (from the name)	before 3.9.1	CNA record
linuxfoundation backstage_plugin-catalog-backend linuxfoundation:backstage_plugin-catalog-backend	before 3.9.1	NVD
linuxfoundation backstage linuxfoundation:backstage	before 1.54.6	NVD

References

https://github.com/backstage/backstage/security/advisories/GHSA-pcmq-25r3-5w9vx-refsource-confirm, vendor-advisory
https://github.com/backstage/backstage/commit/23774b61560d851bc69cd6a77d12561b24d11afdx-refsource-misc, patch
https://github.com/backstage/backstage/releases/tag/v1.54.6x-refsource-misc, 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.