CVE-2026-45156
- Source
- https://cve.org/CVERecord?id=CVE-2026-45156
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45156.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-45156
- Aliases
-
- GHSA-qqgv-fqwp-mjpp
- Published
- 2026-06-01T16:38:46Z
- Modified
- 2026-10-21T02:58:04Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- Nextcloud: Authentication Bypass in ID4me handling via Missing JWT Signature Verification in User OIDC
- Details
-
Nextcloud is an open source content collaboration platform. From versions 0.3.0 to before 3.1.0, 5.0.0 to before 5.1.0, and 6.0.0 to before 6.4.0, a missing signature verification in User OIDC allowed a malicious ID4me authority to identify as any user. This issue has been patched in versions 3.1.0, 4.1.0, 5.1.0, 6.4.0 and 8.3.0.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-287" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45156.json" }- References
-
- https://hackerone.com/reports/3489490
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45156.json
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qqgv-fqwp-mjpp
- https://nvd.nist.gov/vuln/detail/CVE-2026-45156
- https://github.com/nextcloud/user_oidc/pull/1285
Affected packages
Git / github.com/nextcloud/user_oidc
Affected ranges
- Type
- GIT
- Repo
- https://github.com/nextcloud/user_oidc
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0.3.0" }, { "fixed": "3.1.0" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "introduced": "5.0.0" }, { "fixed": "5.1.0" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "introduced": "6.0.0" }, { "fixed": "6.4.0" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" } ] }