[backstage-goalie]

This PR contains the following updates:

Package	Change	Age	Confidence
@backstage/plugin-auth-node (source)	0.6.7 → 0.6.15

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Backstage: Explicit negative email verification can be ignored during shared OAuth profile normalization

CVE-2026-106460 / GHSA-xm5q-p7w3-x6cp

More information

Details

Impact

Several Passport-based authentication providers use shared OAuth profile normalization from @backstage/plugin-auth-node. Affected versions may pass an email to email-based sign-in resolvers even when verification metadata supplied for that same address is explicitly negative. The ID-token-only fallback likewise did not consistently respect email_verified: false.

Exploitation requires a deployment where an admitted identity-provider user can supply or change an email address without verification and Backstage uses that profile email to resolve catalog identities. In that configuration, the user may be able to assume another catalog identity and obtain its associated access and permissions.

An absent email_verified claim is not by itself considered an affected condition. Some providers rely on authoritative organizational provisioning and intentionally omit the optional claim. Operators using email-based sign-in resolution must ensure that the configured provider restricts sign-in to the intended user population and supplies an authoritative email address, either through provider verification or trusted immutable provisioning.

This advisory covers the shared Passport profile normalization path when the selected profile email itself carries verified: false, when a matching raw provider email carries email_verified: false, or when an email obtained only from an ID token carries email_verified: false. It does not apply verification metadata from a different address or from a separate ID token to an independently fetched provider-profile email.

The generic OIDC provider follows a separate profile transform and is covered by GHSA-826h-28h9-65hg. The two advisories are complementary; deployments using both affected paths should apply both package updates. VMware Cloud uses a separate custom token transformation and is not changed by this patch.

Patches

Fixed in @backstage/plugin-auth-node versions 0.6.15 and 0.7.5. Users remaining on the 0.6.x line should upgrade to at least 0.6.15; users on 0.7.x should upgrade to at least 0.7.5.

The patched packages were released with Backstage v1.49.7 and Backstage v1.54.7, respectively. The fix is also present on master in commit 507e65a.

Workarounds

• Require the identity provider to verify user-controlled email addresses before allowing sign-in.
• Ensure profile emails are immutable and provisioned from a trusted organizational source.
• Use a sign-in resolver that does not depend on the profile email.
• Use a custom profile transform that omits an email when matching provider metadata explicitly marks it as unverified.

Severity

• CVSS Score: 6.8 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

References

• https://github.com/backstage/backstage/security/advisories/GHSA-xm5q-p7w3-x6cp
• https://nvd.nist.gov/vuln/detail/CVE-2026-106460
• https://github.com/backstage/backstage/commit/507e65ab9160aae6b602513dbfaebdd6be0ca8bb
• https://github.com/backstage/backstage/commit/f0a43dacd1b501064da042b43eab9c1e06371d38
• https://github.com/backstage/backstage/commit/fc5e30aba8ea7282ed3658c3b985cec71051cf9d
• https://github.com/backstage/backstage
• https://github.com/backstage/backstage/releases/tag/v1.49.7
• https://github.com/backstage/backstage/releases/tag/v1.54.7

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

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Release Notes

backstage/backstage (@​backstage/plugin-auth-node)

v0.6.15

Compare Source

Patch Changes

• Updated dependencies
  • @​backstage/backend-plugin-api@1.8.1-next.0
  • @​backstage/catalog-client@1.14.0
  • @​backstage/catalog-model@1.7.7
  • @​backstage/config@1.3.6
  • @​backstage/errors@1.2.7
  • @​backstage/types@1.2.2

v0.6.14

Compare Source

Patch Changes

• a49a40d: Updated dependency zod to ^3.25.76 || ^4.0.0 & migrated to /v3 or /v4 imports.
• Updated dependencies
  • @​backstage/backend-plugin-api@1.8.0
  • @​backstage/catalog-client@1.14.0
  • @​backstage/catalog-model@1.7.7

v0.6.13

Compare Source

Patch Changes

• 7455dae: Use node prefix on native imports
• 69d880e: Bump to latest zod to ensure it has the latest features
• Updated dependencies
  • @​backstage/backend-plugin-api@1.7.0
  • @​backstage/catalog-client@1.13.0

v0.6.12

Compare Source

Patch Changes

• 7455dae: Use node prefix on native imports
• 69d880e: Bump to latest zod to ensure it has the latest features
• Updated dependencies
  • @​backstage/backend-plugin-api@1.7.0-next.0
  • @​backstage/catalog-client@1.12.1
  • @​backstage/catalog-model@1.7.6
  • @​backstage/config@1.3.6
  • @​backstage/errors@1.2.7
  • @​backstage/types@1.2.2

v0.6.11

Compare Source

Patch Changes

• 4eeba9e: Upgrade zod-validation-error to version 4
• 872eb91: Upgrade zod-to-json-schema to latest version
• Updated dependencies
  • @​backstage/backend-plugin-api@1.6.1

v0.6.10

Compare Source

Patch Changes

• 2389358: remove leading dot in auth cookie cleanup call
• de96a60: chore(deps): bump express from 4.21.2 to 4.22.0
• b35f8b2: Fixed chunked cookie replacing edge case in OAuthCookieManager class where some of the old chunks would not get removed if new chunked cookie would have fewer chunks.
• e9dd634: fix flawed cookie removal logic with chunked tokens
• Updated dependencies
  • @​backstage/backend-plugin-api@1.6.0

v0.6.9

Compare Source

Patch Changes

• 05f60e1: Refactored constructor parameter properties to explicit property declarations for compatibility with TypeScript's erasableSyntaxOnly setting. This internal refactoring maintains all existing functionality while ensuring TypeScript compilation compatibility.
• Updated dependencies
  • @​backstage/backend-plugin-api@1.5.0
  • @​backstage/config@1.3.6
  • @​backstage/catalog-model@1.7.6
  • @​backstage/catalog-client@1.12.1

v0.6.8

Compare Source

Patch Changes

• Updated dependencies
  • @​backstage/config@1.3.5
  • @​backstage/backend-plugin-api@1.4.4

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