CVE-2026-106494
mediumBackstage is an open framework for building developer portals.
Vendor / product: Linuxfoundation — backstage\/backend defaults
Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that could collide with protected files in the output directory. In certain deployment configurations, this could lead to content injection. This issue is fixed in version 0.17.8.
CVSS
4.9
4.9 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-10-06 21:17
Modified: 2026-10-22 13:03
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 06:58 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
linuxfoundation / backstage\/backend_defaults <0.17.8
linuxfoundation / backstage <1.54.6
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/backstage/backstage/commit/14e925ce5b905dd8daa64c3009722febda76034c
Patch / mitigation: https://github.com/backstage/backstage/releases/tag/v1.54.6
Patch / mitigation: https://github.com/backstage/backstage/security/advisories/GHSA-7649-wm97-w3j3
References
- https://github.com/backstage/backstage/commit/14e925ce5b905dd8daa64c3009722febda76034c security-advisories@github.com
- https://github.com/backstage/backstage/releases/tag/v1.54.6 security-advisories@github.com
- https://github.com/backstage/backstage/security/advisories/GHSA-7649-wm97-w3j3 security-advisories@github.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:58 UTC · record ↗