CVE-2026-106488: Backstage is an open framework for building developer portals

Q: How do I fix CVE-2026-106488?

backstage\/plugin-auth-backend-module-oidc-provider: upgrade to 0.4.20; backstage: upgrade to 1.54.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-106488 being exploited?

CVE-2026-106488 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-106488 affect?

CVE-2026-106488 affects backstage\/plugin-auth-backend-module-oidc-provider, backstage. Severity is high (CVSS 8.1). Backstage is an open framework for building developer portals. Prior to 0.4.20, the @backstage/plugin-auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider. Deployments using OIDC email-based

Q: How urgent is CVE-2026-106488?

Priority 38/100. High severity; On your watchlist

Routine

HIGH 8.1WATCHLISTUPGRADEUPGRADE

CVE-2026-106488 is a high-severity flaw (CVSS 8.1) affecting backstage\/plugin-auth-backend-module-oidc-provider, backstage. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Backstage is an open framework for building developer portals. Prior to 0.4.20, the @backstage/plugin-auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider. Deployments using OIDC email-based identity resolution with a provider that permits unverified email addresses may allow an authenticated provider user to assume another catalog identity. This may grant access and permissions associated with tha

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-10-06
Last modified	2026-10-22

Publisher (CNA): GitHub, Inc. · Vendor: linuxfoundation

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-06 21:17 UTCPublished CVE record published
2026-10-22 14:44 UTCUpdated Record last modified

linuxfoundation backstage\/plugin-auth-backend-module-oidc-provider UPGRADE

Affected: < 0.4.20

Fixed in: 0.4.20

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls backstageplugin-auth-backend-module-oidc-provider

2. UPGRADE to 0.4.20

npm install backstageplugin-auth-backend-module-oidc-provider@">=0.4.20"

linuxfoundation backstage UPGRADE

Affected: < 1.54.6

Fixed in: 1.54.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy backstage || rpm -q backstage || backstage --version

2. UPGRADE to 1.54.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade backstage

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade backstage

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-106488?

backstage\/plugin-auth-backend-module-oidc-provider: upgrade to 0.4.20; backstage: upgrade to 1.54.6. Exact commands for each OS are on this page.

Is CVE-2026-106488 being exploited?

CVE-2026-106488 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-106488 affect?

CVE-2026-106488 affects backstage\/plugin-auth-backend-module-oidc-provider, backstage. Severity is high (CVSS 8.1). Backstage is an open framework for building developer portals. Prior to 0.4.20, the @backstage/plugin-auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider. Deployments using OIDC email-based

How urgent is CVE-2026-106488?

Priority 38/100. High severity; On your watchlist

References

← Back to latest CVEs