CVE-2026-106457

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Source
https://cve.org/CVERecord?id=CVE-2026-106457
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106457.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-106457
Aliases
  • GHSA-q333-f498-w2x7
Published
2026-10-06T20:13:26Z
Modified
2026-10-07T10:47:16Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
Backstage: Insufficient audience validation in the Cloudflare Access auth provider
Details

Backstage is an open framework for building developer portals. From 0.1.0 until 0.5.0, the @backstage/plugin-auth-backend-module-cloudflare-access-provider package is affected by insufficient audience validation in the cloudflare access auth provider. The Cloudflare Access auth provider verifies a token's signature and team issuer, but affected versions do not verify that the token was issued for the Backstage application. A user holding a valid token for another Access application in the same Cloudflare Zero Trust team may therefore be able to authenticate to Backstage if that token reaches the auth endpoint without the Backstage application's audience already being enforced upstream. Cloudflare Access normally evaluates the protected application before forwarding requests. This issue is fixed in version 0.5.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-287"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106457.json"
}
References

Affected packages

Git / github.com/backstage/backstage

Affected ranges

Type
GIT
Repo
https://github.com/backstage/backstage
Events
Introduced
fec7c1d04ab5f897cf8c21acd9a0ec366b1a8db3
Fixed
23161ae67d0f064e97c60c4c62b86e94c43a383e
Introduced
5c26725361f16e5e052fc79ef3b0c30b25731e22
Fixed
70b6384c26df22f862351be65f504ca2db02b762
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "1.26.0"
        },
        {
            "fixed": "1.55.0"
        },
        {
            "introduced": "0.1.0"
        },
        {
            "fixed": "0.5.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

Other
cli-old-cache-watch
release-2021-01-07
release-2021-1-7
v0.*
v0.1.0
v0.1.1
v0.1.1-alpha.0
v0.1.1-alpha.1
v0.1.1-alpha.10
v0.1.1-alpha.11
v0.1.1-alpha.12
v0.1.1-alpha.13
v0.1.1-alpha.15
v0.1.1-alpha.16
v0.1.1-alpha.17
v0.1.1-alpha.18
v0.1.1-alpha.19
v0.1.1-alpha.2
v0.1.1-alpha.20
v0.1.1-alpha.21
v0.1.1-alpha.22
v0.1.1-alpha.23
v0.1.1-alpha.24
v0.1.1-alpha.25
v0.1.1-alpha.26
v0.1.1-alpha.3
v0.1.1-alpha.4
v0.1.1-alpha.5
v0.1.1-alpha.6
v0.1.1-alpha.7
v0.1.1-alpha.8
v0.2.0
v0.3.0
v0.3.1
v0.3.2
v0.4.0
v0.4.1
v0.4.2
v0.4.3
v1.*
v1.26.0
v1.27.0
v1.27.0-next.0
v1.27.0-next.1
v1.27.0-next.2
v1.28.0
v1.28.0-next.0
v1.28.0-next.1
v1.28.0-next.2
v1.28.0-next.3
v1.29.0
v1.29.0-next.0
v1.29.0-next.1
v1.29.0-next.2
v1.30.0
v1.30.0-next.0
v1.30.0-next.1
v1.30.0-next.2
v1.30.0-next.3
v1.30.0-next.4
v1.31.0
v1.31.0-next.0
v1.31.0-next.1
v1.31.0-next.2
v1.32.0
v1.32.0-next.0
v1.32.0-next.1
v1.32.0-next.2
v1.33.0
v1.33.0-next.0
v1.33.0-next.1
v1.33.0-next.2
v1.33.0-next.3
v1.34.0
v1.34.0-next.0
v1.34.0-next.1
v1.34.0-next.2
v1.35.0
v1.35.0-next.0
v1.35.0-next.1
v1.35.0-next.2
v1.36.0
v1.36.0-next.0
v1.36.0-next.1
v1.36.0-next.2
v1.36.0-next.3
v1.37.0
v1.37.0-next.0
v1.37.0-next.1
v1.37.0-next.2
v1.38.0
v1.38.0-next.0
v1.38.0-next.1
v1.38.0-next.2
v1.39.0
v1.39.0-next.0
v1.39.0-next.1
v1.39.0-next.2
v1.39.0-next.3
v1.40.0
v1.40.0-next.0
v1.40.0-next.1
v1.40.0-next.2
v1.40.0-next.3
v1.41.0
v1.41.0-next.0
v1.41.0-next.1
v1.41.0-next.2
v1.42.0
v1.42.0-next.0
v1.42.0-next.1
v1.42.0-next.2
v1.42.0-next.3
v1.43.0
v1.43.0-next.0
v1.43.0-next.1
v1.43.0-next.2
v1.44.0
v1.44.0-next.0
v1.44.0-next.1
v1.44.0-next.2
v1.44.0-next.3
v1.45.0
v1.45.0-next.0
v1.45.0-next.1
v1.45.0-next.2
v1.45.0-next.3
v1.46.0
v1.46.0-next.0
v1.46.0-next.1
v1.46.0-next.2
v1.47.0
v1.47.0-next.0
v1.47.0-next.1
v1.47.0-next.2
v1.47.0-next.3
v1.48.0
v1.48.0-next.0
v1.48.0-next.1
v1.48.0-next.2
v1.49.0
v1.49.0-next.0
v1.49.0-next.1
v1.49.0-next.2
v1.50.0
v1.50.0-next.0
v1.50.0-next.1
v1.50.0-next.2
v1.51.0
v1.51.0-next.0
v1.51.0-next.1
v1.51.0-next.2
v1.51.0-next.3
v1.52.0
v1.52.0-next.0
v1.52.0-next.1
v1.52.0-next.2
v1.53.0
v1.53.0-next.0
v1.53.0-next.1
v1.53.0-next.2
v1.54.0
v1.54.0-next.0
v1.54.0-next.1
v1.54.0-next.2
v1.54.0-next.3
v1.55.0-next.0
v1.55.0-next.1
v1.55.0-next.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106457.json"