CVE-2026-29185

@backstage/integration: Potential reading of SCM URLs using built in token

State: Published
Severity: 2.7 Low
Published: Mar 7, 2026
Updated: Mar 9, 2026
Reserved: Mar 4, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	2.7 Low	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
backstagebackstage	< 1.20.1Affected

References

https://github.com/backstage/backstage/security/advisories/GHSA-95v5-prp4-5gv5

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