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CVE-2026-33868: URL Redirection to Untrusted Site

🗓️ 27 Mar 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 1 Views

Unauthenticated Open Redirect in Mastodon prior to 4.5.8, 4.4.15, 4.3.21 via %2F encoding.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-33868
27 Mar 202619:50
–attackerkb
circl
Circl
CVE-2026-33868
25 Mar 202611:02
–circl
cnnvd
CNNVD
Mastodon 输入验证错误漏洞
27 Mar 202600:00
–cnnvd
cve
CVE
CVE-2026-33868
27 Mar 202619:50
–cve
cvelist
Cvelist
CVE-2026-33868 Mastodon has a GET-Based Open Redirect via '/web/%2F<domain>'
27 Mar 202619:50
–cvelist
euvd
EUVD
EUVD-2026-16783
27 Mar 202619:50
–euvd
nuclei
Nuclei
Mastodon - Open Redirect
26 Sep 202602:05
–nuclei
nvd
NVD
CVE-2026-33868
27 Mar 202620:16
–nvd
osv
OSV
BIT-MASTODON-2026-33868 Mastodon has a GET-Based Open Redirect via '/web/%2F<domain>'
31 Mar 202608:45
–osv
ptsecurity
Positive Technologies
PT-2026-28106
25 Mar 202600:00
–ptsecurity
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30 Mar 2026 00:00Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.14.3 - 6.1
EPSS0.00552
SSVC
1