CVE-2026-106486

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-10-06 18:46 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-10-06 21:17 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-10-23 15:01 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.4% in the next 30 days (EPSS).
• Severity: 8.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-10-06 21:17 UTC

Last modified

2026-10-23 15:01 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-22 · Path traversal

Record status

Analyzed

Affected

• Linuxfoundation backstage\/plugin-scaffolder-backend-module-bitbucket-cloud < 0.3.10
• Linuxfoundation backstage\/plugin-scaffolder-backend-module-bitbucket-server < 0.2.25
• Linuxfoundation Backstage < 1.54.6

Attack profile CVSS 3.1 · 8.5

Attack vector

Network

Complexity

High

Privileges needed

Low

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-106486.md and follow it. Check whether this project is affected by CVE-2026-106486. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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