What is CVE-2026-29185?

CVE-2026-29185 is a low-severity vulnerability in Backstage, classified under Path Traversal. CVSS score: 2.7/10. Published 2026-03-07.

How severe is CVE-2026-29185?

Low severity. CVSS v3 base score is 2.7 out of 10.

Path Traversal in Backstage

CVE-2026-29185

Backstage is an open framework for building developer portals. Prior to version 1.20.1, a vulnerability in the SCM URL parsing used by Backstage integrations allowed path traversal sequences in encoded form to be included in file paths. When these URLs were processed by integration functions that construct API URLs, the traversal segments could redirect requests to unintended SCM provider API endpoints using the configured server-side integration credentials. This issue has been patched in version 1.20.1.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.003 (27.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.

Affected products

Backstage — versions < 1.20.1
Linuxfoundation Backstage\/integration

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-29185?: CVE-2026-29185 is a low-severity vulnerability in Backstage, classified under Path Traversal. CVSS score: 2.7/10. Published 2026-03-07.
How severe is CVE-2026-29185?: Low severity. CVSS v3 base score is 2.7 out of 10.