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CVE-2026-33868

🗓️ 27 Mar 2026 19:50:07Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 65 Views🌐 WEB

Mastodon versions before 4.5.8, 4.4.15, and 4.3.21 have an unauthenticated open redirect via /web/%2F<domain> enabling phishing.

Related
Detection
Affected
Refs
Paths
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 input validation vulnerability
27 Mar 202600:00
–cnnvd
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
kittysploit
KittySploit
Mastodon - Open Redirect Detection
28 Jul 202611:27
–kittysploit
nuclei
Nuclei
Mastodon - Open Redirect
31 Oct 202602:03
–nuclei
nvd
NVD
CVE-2026-33868
27 Mar 202620:16
–nvd
osv_bit
osv_bit
BIT-MASTODON-2026-33868 Mastodon has a GET-Based Open Redirect via '/web/%2F<domain>'
31 Mar 202608:45
–osv_bit
ptsecurity
Positive Technologies
PT-2026-28106
25 Mar 202600:00
–ptsecurity
Rows per page
NVD
Vulners
Node
OR
joinmastodonmastodonRange4.4.0–4.4.15
joinmastodonmastodonRange4.5.0–4.5.8
[
  {
    "vendor": "mastodon",
    "product": "mastodon",
    "versions": [
      {
        "version": ">= 4.5.0, < 4.5.8",
        "status": "affected"
      },
      {
        "version": ">= 4.4.0, < 4.4.15",
        "status": "affected"
      },
      {
        "version": "< 4.3.21",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
%2Finteract.sh:443path/web/%2Finteract.sh:443Unauthenticated Open Redirect vulnerability due to improper handling of URL-encoded path segments (%2F).CWE-601

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