{"url":"http://public2.vulnerablecode.io/api/packages/545686?format=json","purl":"pkg:npm/%40backstage/plugin-auth-backend@0.0.0-nightly-20213322746","type":"npm","namespace":"@backstage","name":"plugin-auth-backend","version":"0.0.0-nightly-20213322746","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"0.27.1","latest_non_vulnerable_version":"0.27.1","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/50886?format=json","vulnerability_id":"VCID-e5ww-6h1c-cyd6","summary":"@backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch\nA Server-Side Request Forgery (SSRF) vulnerability exists in `@backstage/plugin-auth-backend` when `auth.experimentalClientIdMetadataDocuments.enabled` is set to `true`. The CIMD\nmetadata fetch validates the initial `client_id` hostname against private IP ranges but does not apply the same validation after HTTP redirects.\n\nThe practical impact is limited. The attacker cannot read the response body from the internal request, cannot control request headers or method, and the feature must be explicitly\nenabled via an experimental flag that is off by default. Deployments that restrict `allowedClientIdPatterns` to specific trusted domains are not affected.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-32236.json","reference_id":"","reference_type":"","scores":[],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-32236.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-32236","reference_id":"","reference_type":"","scores":[{"value":"0.00047","scoring_system":"epss","scoring_elements":"0.14863","published_at":"2026-06-07T12:55:00Z"},{"value":"0.00047","scoring_system":"epss","scoring_elements":"0.14802","published_at":"2026-06-09T12:55:00Z"},{"value":"0.00047","scoring_system":"epss","scoring_elements":"0.1478","published_at":"2026-06-08T12:55:00Z"},{"value":"0.00047","scoring_system":"epss","scoring_elements":"0.14904","published_at":"2026-06-06T12:55:00Z"},{"value":"0.00047","scoring_system":"epss","scoring_elements":"0.14907","published_at":"2026-06-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-32236"},{"reference_url":"https://github.com/backstage/backstage","reference_id":"","reference_type":"","scores":[{"value":"1.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U"},{"value":"LOW","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/backstage/backstage"},{"reference_url":"https://github.com/backstage/backstage/commit/17038abf2dfdb4abc08a59b1c95af39851de0e07","reference_id":"","reference_type":"","scores":[{"value":"1.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U"},{"value":"LOW","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-12T20:38:12Z/"}],"url":"https://github.com/backstage/backstage/commit/17038abf2dfdb4abc08a59b1c95af39851de0e07"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2447090","reference_id":"2447090","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2447090"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32236","reference_id":"CVE-2026-32236","reference_type":"","scores":[{"value":"1.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U"},{"value":"LOW","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32236"},{"reference_url":"https://github.com/advisories/GHSA-qp4c-xg64-7c6x","reference_id":"GHSA-qp4c-xg64-7c6x","reference_type":"","scores":[{"value":"LOW","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-qp4c-xg64-7c6x"},{"reference_url":"https://github.com/backstage/backstage/security/advisories/GHSA-qp4c-xg64-7c6x","reference_id":"GHSA-qp4c-xg64-7c6x","reference_type":"","scores":[{"value":"LOW","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"1.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U"},{"value":"LOW","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-12T20:38:12Z/"}],"url":"https://github.com/backstage/backstage/security/advisories/GHSA-qp4c-xg64-7c6x"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/74854?format=json","purl":"pkg:npm/%40backstage/plugin-auth-backend@0.27.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540backstage/plugin-auth-backend@0.27.1"}],"aliases":["CVE-2026-32236","GHSA-qp4c-xg64-7c6x"],"risk_score":1.4,"exploitability":"0.5","weighted_severity":"2.7","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-e5ww-6h1c-cyd6"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/41789?format=json","vulnerability_id":"VCID-jsb1-yszs-vbfs","summary":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\nBackstage is an open platform for building developer portals.This attack can potentially allow the attacker to exfiltrate access tokens or other secrets from the user's browser. The default CSP does prevent this attack, but it is expected that some deployments have these policies disabled due to incompatibilities. This is vulnerability is patched in version `0.4.9` of `@backstage/plugin-auth-backend`.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-43776","reference_id":"","reference_type":"","scores":[{"value":"0.00311","scoring_system":"epss","scoring_elements":"0.54615","published_at":"2026-06-06T12:55:00Z"},{"value":"0.00311","scoring_system":"epss","scoring_elements":"0.54586","published_at":"2026-06-08T12:55:00Z"},{"value":"0.00311","scoring_system":"epss","scoring_elements":"0.54607","published_at":"2026-06-09T12:55:00Z"},{"value":"0.00311","scoring_system":"epss","scoring_elements":"0.54547","published_at":"2026-06-04T12:55:00Z"},{"value":"0.00311","scoring_system":"epss","scoring_elements":"0.54605","published_at":"2026-06-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-43776"},{"reference_url":"https://github.com/backstage/backstage","reference_id":"","reference_type":"","scores":[{"value":"7.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/backstage/backstage"},{"reference_url":"https://github.com/backstage/backstage/tree/master/plugins/auth-backend","reference_id":"","reference_type":"","scores":[{"value":"7.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/backstage/backstage/tree/master/plugins/auth-backend"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43776","reference_id":"CVE-2021-43776","reference_type":"","scores":[{"value":"7.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43776"},{"reference_url":"https://github.com/advisories/GHSA-w7fj-336r-vw49","reference_id":"GHSA-w7fj-336r-vw49","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-w7fj-336r-vw49"},{"reference_url":"https://github.com/backstage/backstage/security/advisories/GHSA-w7fj-336r-vw49","reference_id":"GHSA-w7fj-336r-vw49","reference_type":"","scores":[{"value":"7.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N"},{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/backstage/backstage/security/advisories/GHSA-w7fj-336r-vw49"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/59691?format=json","purl":"pkg:npm/%40backstage/plugin-auth-backend@0.4.9","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e5ww-6h1c-cyd6"},{"vulnerability":"VCID-k56s-6jhu-abex"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540backstage/plugin-auth-backend@0.4.9"}],"aliases":["CVE-2021-43776","GHSA-w7fj-336r-vw49"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-jsb1-yszs-vbfs"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/50921?format=json","vulnerability_id":"VCID-k56s-6jhu-abex","summary":"@backstage/plugin-auth-backend: OAuth redirect URI allowlist bypass\nThe experimental OIDC provider in `@backstage/plugin-auth-backend` is vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents and configured `allowedRedirectUriPatterns` are affected.\n\nA specially crafted redirect URI can pass the allowlist validation while resolving to an attacker-controlled host. If a victim approves the resulting OAuth consent request, their authorization code is sent to the attacker, who can exchange it for a valid access token.\n\nThis requires victim interaction and that one of the experimental features is explicitly enabled, which is not the default.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-32235.json","reference_id":"","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-32235.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-32235","reference_id":"","reference_type":"","scores":[{"value":"0.00033","scoring_system":"epss","scoring_elements":"0.09988","published_at":"2026-06-09T12:55:00Z"},{"value":"0.00033","scoring_system":"epss","scoring_elements":"0.10052","published_at":"2026-06-05T12:55:00Z"},{"value":"0.00033","scoring_system":"epss","scoring_elements":"0.10068","published_at":"2026-06-06T12:55:00Z"},{"value":"0.00033","scoring_system":"epss","scoring_elements":"0.10039","published_at":"2026-06-07T12:55:00Z"},{"value":"0.00033","scoring_system":"epss","scoring_elements":"0.09954","published_at":"2026-06-08T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-32235"},{"reference_url":"https://github.com/backstage/backstage","reference_id":"","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/backstage/backstage"},{"reference_url":"https://github.com/backstage/backstage/commit/6042dd0c7f0706e0f473dafa92799ecf19c825ec","reference_id":"","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/backstage/backstage/commit/6042dd0c7f0706e0f473dafa92799ecf19c825ec"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2447075","reference_id":"2447075","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2447075"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32235","reference_id":"CVE-2026-32235","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32235"},{"reference_url":"https://github.com/advisories/GHSA-wqvh-63mv-9w92","reference_id":"GHSA-wqvh-63mv-9w92","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-wqvh-63mv-9w92"},{"reference_url":"https://github.com/backstage/backstage/security/advisories/GHSA-wqvh-63mv-9w92","reference_id":"GHSA-wqvh-63mv-9w92","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-12T20:38:14Z/"}],"url":"https://github.com/backstage/backstage/security/advisories/GHSA-wqvh-63mv-9w92"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/74854?format=json","purl":"pkg:npm/%40backstage/plugin-auth-backend@0.27.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540backstage/plugin-auth-backend@0.27.1"}],"aliases":["CVE-2026-32235","GHSA-wqvh-63mv-9w92"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-k56s-6jhu-abex"}],"fixing_vulnerabilities":[],"risk_score":"4.0","resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540backstage/plugin-auth-backend@0.0.0-nightly-20213322746"}