6.8

CVE-2026-106460: backstage Improper Authentication

CVSS: 6.8v3.1MediumUndergoing analysis
AliasesGHSA-xm5q-p7w3-x6cp
Published 06-10-2026Last modified 09-10-2026
Open JSON

Vulnerability summary

CVE-2026-106460 is a medium (CVSS 6.8) Improper Authentication vulnerability in backstage. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 22.8% of scored vulnerabilities.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.31%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-10-2026
    PublishedVulnerability first disclosed.
  2. 09-10-2026
    Last modifiedVulnerability information updated.

Description

Backstage is an open framework for building developer portals. From 0.3.0 until 0.6.15 and 0.7.5, the @backstage/plugin-auth-node package did not consistently honor explicit negative email verification during shared OAuth profile normalization. The affected paths include a selected profile email marked verified: false, a matching raw provider email marked email_verified: false, and an email obtained only from an ID token marked email_verified: false. Exploitation requires an admitted identity-provider user who can supply or change an unverified email and a deployment that uses the selected profile email to resolve catalog identities. The verification metadata must apply to the selected email; an absent email_verified claim alone is not affected. In an affected configuration, the user may assume another catalog identity and obtain its associated access and permissions. This issue is fixed in versions 0.6.15 and 0.7.5.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

07-10-202620-10-2026
EPSS score
0.31%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

@backstage2 products
  • plugin-auth-node≥ 0.3.0, < 0.6.15 | ≥ 0.7.0, < 0.7.5
  • plugin-auth-node≥ 0.3.0, < 0.6.15 | ≥ 0.7.0, < 0.7.5
Backstage1 product
  • backstage≥ 1.18.0, < 1.49.7 | ≥ 1.50.0-next.0, < 1.54.7

2 vendors · 3 products

References

8 links