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GHSA-vwp5-f99x-x3rq

MediumCVSS 5.3 / 10
Published Oct 7, 2026·Last modified Oct 7, 2026
Affected Components(1)
npm logo@backstage/plugin-scaffolder-backend
< 4.1.0
Description

Impact

An authenticated Backstage user with permission to create and read relevant scaffolder tasks may be able to infer confidential task data under specific conditions. Successful exploitation requires retained task secrets, visibility of a target task, knowledge of the secret structure, and repeated requests.

Patches

Patched in @backstage/plugin-scaffolder-backend version 4.1.0

Workarounds

  • At the gateway or reverse proxy, reject task-list requests that specify custom ordering, or allow ordering only by created_at, status, and created_by.
  • Restrict scaffolder task creation and task read permissions to trusted users, preferably using owner-based task-read conditions.
  • Disabling task recovery can reduce secret retention after a task is claimed, but it does not protect secrets in queued tasks and should not be treated as complete mitigation.
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Risk Scores
Base Score
5.3

The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.

Threat Intelligence
4.9

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.22%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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