CVE-2026-32237Network attack vector

Authenticated secret disclosure via dry-run template evaluation

Published Mar 12, 2026 · Updated Mar 12, 2026

Information disclosure in Backstage @backstage/plugin-scaffolder-backend before 3.1.5 allows remote authenticated users to read environment secrets. NunjucksWorkflowRunner populated the dry-run template context with default environment secrets, allowing expressions to resolve them into action inputs surfaced in the API response. Exploitation requires dry-run permission and a deployment configured with scaffolder.defaultEnvironment.secrets; disclosed values can expose server credentials.

CVSS severity4.4
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Backstage @backstage/plugin-scaffolder-backend before 3.1.5 allows remote authenticated users to read environment secrets. NunjucksWorkflowRunner populated the dry-run template context with default environment secrets, allowing expressions to resolve them into action inputs surfaced in the API response. Exploitation requires dry-run permission and a deployment configured with scaffolder.defaultEnvironment.secrets; disclosed values can expose server credentials.

The record

CVE
CVE-2026-32237
Published
Mar 12, 2026
Updated
Mar 12, 2026
Vendor
Backstage
Product
@backstage/plugin-scaffolder-backend
Classifications
CWE-200, T1552
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Backstage · @backstage/plugin-scaffolder-backendversion=< 3.1.5

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.4GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552Unsecured Credentials

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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