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CVE-2026-106502

MEDIUM 5.3

Published 2026-10-06 · Last modified 2026-10-07

Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package could expose sensitive information in Scaffolder task failure events. Under specific template and failure conditions, an authenticated user may retrieve backend-managed credentials used during task execution from affected task events. This issue is fixed in version 4.1.0.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.3%chance of exploitation in 30 days · 21st percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

5.3CVSS 3.1 · MEDIUM

  • ConfidentialityHigh
  • IntegrityNone
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ⚠Complexity: Needs a race window or specific setup

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Backstage @Backstage Linuxfoundation

Products Backstage Plugin Scaffolder Backend Backstage\/Plugin Scaffolder Backend

Weakness (CWE)

  • CWE-532: : Insertion of Sensitive Information into Log File

CVSS vector

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

References and research data (JSON)

Packages and version ranges

Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.

  • @backstage/plugin-scaffolder-backend npm

    pkg:npm/%40backstage/plugin-scaffolder-backend

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 4.1.0
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-95p4-vv4g-jxxm/GHSA-95p4-vv4g-jxxm.json"
  }
}
    GitHub Advisory Database · GHSA-95p4-vv4g-jxxm · Updated 2026-10-07T16:30:06.541153723Z

Vendor product assessments

  • rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend as a component of Red Hat Developer Hub · known affected

    Vendor assessment for this product only.

    pkg:oci/red-hat-developer-hub-backstage-plugin-orchestrator-backend?repository_url=registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend

    • workaround: To mitigate this strictly limit Scaffolder template execution and task-event log access to highly trusted administrators, preventing unauthorized users from viewing sensitive failure events. Additionally, proactively identify, revoke, and rotate any backend-managed secrets or credentials that may have already leaked into historical task failure logs.
    • none available: Fix deferred
    Red Hat · CVE-2026-106502 · Updated 2026-10-09T07:19:19+00:00
  • rhdh/rhdh-hub-rhel9 as a component of Red Hat Developer Hub · known affected

    Vendor assessment for this product only.

    pkg:oci/rhdh-hub-rhel9?repository_url=registry.redhat.io/rhdh/rhdh-hub-rhel9

    • workaround: To mitigate this strictly limit Scaffolder template execution and task-event log access to highly trusted administrators, preventing unauthorized users from viewing sensitive failure events. Additionally, proactively identify, revoke, and rotate any backend-managed secrets or credentials that may have already leaked into historical task failure logs.
    • none available: Fix deferred
    Red Hat · CVE-2026-106502 · Updated 2026-10-09T07:19:19+00:00
  • ansible-automation-platform/automation-portal as a component of Self-service automation portal 2 · known affected

    Vendor assessment for this product only.

    pkg:oci/automation-portal?repository_url=registry.redhat.io/ansible-automation-platform/automation-portal

    • workaround: To mitigate this strictly limit Scaffolder template execution and task-event log access to highly trusted administrators, preventing unauthorized users from viewing sensitive failure events. Additionally, proactively identify, revoke, and rotate any backend-managed secrets or credentials that may have already leaked into historical task failure logs.
    • none available: Fix deferred
    Red Hat · CVE-2026-106502 · Updated 2026-10-09T07:19:19+00:00
  • ansible-automation-platform/bootc-automation-portal-rhel9 as a component of Self-service automation portal 2 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-automation-portal-rhel9?repository_url=registry.redhat.io/ansible-automation-platform/bootc-automation-portal-rhel9

    • workaround: To mitigate this strictly limit Scaffolder template execution and task-event log access to highly trusted administrators, preventing unauthorized users from viewing sensitive failure events. Additionally, proactively identify, revoke, and rotate any backend-managed secrets or credentials that may have already leaked into historical task failure logs.
    • none available: Fix deferred
    Red Hat · CVE-2026-106502 · Updated 2026-10-09T07:19:19+00:00

Known Affected Software Configurations

VendorProductVersion range
LinuxfoundationBackstage\/Plugin Scaffolder Backend< 4.1.0
LinuxfoundationBackstage< 1.54.6

All CVSS metrics

  • MEDIUM 5.3 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
  • MEDIUM 5.3 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS