Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder. An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
CVE-2026-106501
CRITICALPre-NVD 9.69.6
EchelonGraph scoreLOW confidence
This critical-severity CVE scores 9.6 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: cna:github_m
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 9.6Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 9.6
- EG Score
- 9.6CRITICALlow confidence
- EG Risk
- 43EG Risk 43/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity96% × 45%Exploitation0% × 40%Automatability0% × 15%CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 6, 2026
Last Modified
October 7, 2026
Advisory Details (7)
Auto-updated Oct 7, 2026Patch available. Sources: github_commit, github_release, github.
githubMentions a patch (unverified)
Sensitive information exposure in Scaffolder · Advisory · backstage/backstage · GitHub
https://github.com/backstage/backstage/security/advisories/GHSA-g2v8-7jhw-pp8pgithub_release Patch Available
v1.54.6
Patch available: backstage/backstage v1.54.6
https://github.com/backstage/backstage/releases/tag/v1.54.6github_release Patch Available
v1.50.5
Patch available: backstage/backstage v1.50.5
https://github.com/backstage/backstage/releases/tag/v1.50.5github_release Patch Available
v1.49.6
Patch available: backstage/backstage v1.49.6
https://github.com/backstage/backstage/releases/tag/v1.49.6github_commit Patch Available
commit e262d649981f (backstage/backstage)
Patch available: backstage/backstage v1.50.5 (contains commit e262d649981f)
https://github.com/backstage/backstage/commit/e262d649981ff99bb01ca7077807ae3e25e85560github_commit Patch Available
commit c19838870476 (backstage/backstage)
Patch available: backstage/backstage v1.49.6 (contains commit c19838870476)
https://github.com/backstage/backstage/commit/c19838870476a8e29144c84b1a5ac0654ec20fb5github_commit Patch Available
commit 66d2219edf0a (backstage/backstage)
Patch available: backstage/backstage v1.54.6 (contains commit 66d2219edf0a)
https://github.com/backstage/backstage/commit/66d2219edf0abe33ab7d0c1ced5d069d1e065be5Vendor Advisories for CVE-2026-106501(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| @backstage/plugin-scaffolder-backend | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 4× in last 7d / 4× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-07 17:22 UTCEG score recompute
- 2026-10-06 22:32 UTCEG score recompute
- 2026-10-06 21:47 UTCEG score recompute
- 2026-10-06 21:46 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(4)
What is CVE-2026-106501?
CVE-2026-106501 is a critical vulnerability published on October 6, 2026. Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder. An authenticated Backstage user who can read another user's Scaffolder task may…
When was CVE-2026-106501 disclosed?
CVE-2026-106501 was first published on October 6, 2026, with the most recent update on October 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-106501?
CVE-2026-106501 has a CVSS base score of 9.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-106501?
A fix for CVE-2026-106501 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-106501 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-106501
Is Your Infrastructure Affected by CVE-2026-106501?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.