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No exploitation reportedFix available

CVE-2026-106502

Backstage: Sensitive information may be exposed in Scaffolder task failure events

No exploitation reported by the sources we read.

  • Published2026-10-06
  • Fixed in1.54.6
  • WeaknessCWE-532

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-10-0622:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-106502?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-106502?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Linuxfoundation backstage
BranchAffectedFixed in
1.54< 1.54.61.54.6
Linuxfoundation backstage\/plugin-scaffolder-backend
BranchAffectedFixed in
4.1< 4.1.04.1.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2026-106502 Red Hat Product Security4 known affected

    plugin-scaffolder-backend: plugin-scaffolder-backend: Information disclosure via task failure events

    rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend as a component of Red Hat Developer Hub · rhdh/rhdh-hub-rhel9 as a component of Red Hat Developer Hub · ansible-automation-platform/automation-portal as a component of Self-service automation portal 2 · +1 more

Full record on NVD

Fix

  1. Update Linuxfoundation backstage to 1.54.6
  2. Workaround from the vendor Red Hat Product Security CVE-2026-106502 · 4 productsTo 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 h…
  3. No fix available, says the vendor Red Hat Product Security CVE-2026-106502 · 4 productsFix deferred

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2026-10-07
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.15.3read 2026-10-23
  • CNAweakness (CWE)CWE-532read 2026-10-23
  • FIRST EPSSEPSS score0.3 %2026-10-22
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Published
2026-10-06
Last Modified
2026-10-13
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-106502?

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.

Is CVE-2026-106502 actively exploited?

Active exploitation of CVE-2026-106502 has not been confirmed. Its EPSS score was 0.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-106502?

CVE-2026-106502 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.

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