What is CVE-2026-106496?

CVE-2026-106496 is a low-severity vulnerability in Backstage, classified under Path Traversal. CVSS score: 3.1/10. Published 2026-10-06.

How severe is CVE-2026-106496?

Low severity. CVSS v3 base score is 3.1 out of 10.

Auth bypass in Backstage

CVE-2026-106496

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.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2026-10-06 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Backstage — versions < 1.54.6

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-106496?: CVE-2026-106496 is a low-severity vulnerability in Backstage, classified under Path Traversal. CVSS score: 3.1/10. Published 2026-10-06.
How severe is CVE-2026-106496?: Low severity. CVSS v3 base score is 3.1 out of 10.