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CVE-2026-106486

9.9, critical

backstage Path Traversal Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
9.9, critical critical CVSS v3.1
EPSS, next 30 days
0.3% higher than 24.3% of scored CVEs
Exploitation
No public evidence
Published
6 Oct 202618 days ago

Description

Backstage is an open framework for building developer portals. Prior to 0.3.10 in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud and 0.2.25 in @backstage/plugin-scaffolder-backend-module-bitbucket-server, the Bitbucket pull-request Scaffolder actions did not sufficiently validate filesystem paths. An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability. This issue is fixed in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server 0.2.25.

Details

Vendor
Backstage and 1 more
Product
backstage
Weakness
CWE-22 (opens in a new tab)
Status
Analyzed
Updated
23 Oct 2026
Assigner
security-advisories@github.com

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References 3

Patches and fixes 2

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Backstage CVEs

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Beyond this page

Is CVE-2026-106486 in your network?

This page tells you how dangerous CVE-2026-106486 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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    Find it before attackers do

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 24 Oct 2026, not the live upstream state.