CVE-2026-106460: backstage · Improper Authentication
Affects backstageSource GCVE Database
Not known to be exploited · CVSS 6.8 Medium : upgrade to 1.54.7 or 1.49.7 when convenient.
Data as of 27 Oct 2026, 21:15 UTC
- Patch
- Available – fixed in 1.54.7, 1.49.7
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 6 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade backstage to 1.54.7 or 1.49.7.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| backstage backstage | Affected
| Fixed in
|
AI-suggested
This vulnerability is fixed in Backstage versions 1.49.7 and 1.54.7. Users should upgrade to these versions or later to remediate the issue. No additional mitigation steps are indicated beyond applying the official fixes.
Description
Backstage versions from 1.18.0 up to but excluding 1.49.7, and from 1.50.0-next.0 up to but excluding 1.54.7, contain an improper authentication vulnerability in the @backstage/plugin-auth-node package. This flaw allows an attacker with an admitted identity-provider user account to assume another catalog identity by exploiting inconsistent handling of explicit negative email verification flags during OAuth profile normalization. The issue is fixed in versions 1.49.7 and 1.54.7.
References
- github.com/backstage/backstage/security/advisories/GHSA-xm5q-p7w3-x6cp (opens in a new tab)
- github.com/backstage/backstage/commit/507e65ab9160aae6b602513dbfaebdd6be0ca8bb (opens in a new tab)
- github.com/backstage/backstage/commit/f0a43dacd1b501064da042b43eab9c1e06371d38 (opens in a new tab)
- github.com/backstage/backstage/commit/fc5e30aba8ea7282ed3658c3b985cec71051cf9d (opens in a new tab)
- github.com/backstage/backstage/releases/tag/v1.49.7 (opens in a new tab)
- github.com/backstage/backstage/releases/tag/v1.54.7 (opens in a new tab)