What is CVE-2026-106507?

CVE-2026-106507 is a medium-severity vulnerability in Backstage, classified under Improper Link Resolution Before File Access. CVSS score: 5.3/10. Published 2026-10-06.

How severe is CVE-2026-106507?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Backstage

CVE-2026-106507

Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by techdocs arbitrary file read via mkdocs snippets. Unsafe path resolution in TechDocs source tree handling allows an authenticated user who can register documentation sources to include content from outside the intended documentation boundary. Depending on deployment, this may expose files readable by the build process. This issue is fixed in version 1.15.4.

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

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/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
@Backstage/plugin-Techdocs-Node Plugin-Techdocs-Node — versions < 1.15.4

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-106507?: CVE-2026-106507 is a medium-severity vulnerability in Backstage, classified under Improper Link Resolution Before File Access. CVSS score: 5.3/10. Published 2026-10-06.
How severe is CVE-2026-106507?: Medium severity. CVSS v3 base score is 5.3 out of 10.