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Open Redirect in user_oidc login flow via protocol-relative URL bypass

🗓️ 12 May 2026 08:51:06Reported by NextcloudType 
nextcloud
 nextcloud
🔗 github.com👁 35 Views

There is an open redirect in the identity connect login flow via protocol relative bypass.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-45278
1 Jun 202616:51
–attackerkb
cnnvd
CNNVD
Nextcloud user_oidc 输入验证错误漏洞
1 Jun 202600:00
–cnnvd
cve
CVE
CVE-2026-45278
1 Jun 202616:51
–cve
cvelist
Cvelist
CVE-2026-45278 Nextcloud: Open Redirect in user_oidc login flow via protocol-relative URL bypass
1 Jun 202616:51
–cvelist
euvd
EUVD
EUVD-2026-33704
1 Jun 202616:51
–euvd
mend
Mend
CVE-2026-45278
1 Jun 202616:51
–mend
nvd
NVD
CVE-2026-45278
1 Jun 202619:16
–nvd
ptsecurity
Positive Technologies
PT-2026-45523
1 Jun 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-45278: URL Redirection to Untrusted Site
1 Jun 202600:00
–rapid7
redhatcve
RedhatCVE
CVE-2026-45278
5 Jun 202619:47
–redhatcve
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12 May 2026 08:51Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.13.3 - 6.1
EPSS0.00322
SSVC
35