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Joinmastodon MastodonMastodon: Insufficient verification of email addresses

Risk 43
Severity
8.2
First published (updated )
CVE-2026-41259

Joinmastodon MastodonMastodon has a denial of service for quote authorization

Risk 32
Severity
4.8
First published (updated )
CVE-2026-33869

Joinmastodon MastodonMastodon has a GET-Based Open Redirect via '/web/%2F<domain>'

Risk 38
Severity
6.1
First published (updated )
CVE-2026-33868

Joinmastodon MastodonMastodon has SSRF via unvalidated FASP Provider base_url

Risk 26
Severity
5.9
EPSS
0.05%
First published (updated )
CVE-2026-27477

Joinmastodon MastodonMastodon may allow unconfirmed FASP to make subscriptions

Risk 38
Severity
8.2
EPSS
0.05%
First published (updated )
CVE-2026-27468
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Joinmastodon MastodonMastodon's signature-dependent ActivityPub collection responses cached under signature-independent keys (Web Cache Poisoning via `Rails.cache`)

Risk 28
Severity
6.5
EPSS
0.05%
First published (updated )
CVE-2026-25540

Joinmastodon MastodonMastodon has insufficient access control to push notification settings

Risk 28
Severity
6.5
EPSS
0.03%
First published (updated )
CVE-2026-23964

Joinmastodon MastodonMastodon missing length limits on list names, filter names, and filter keywords

Risk 27
Severity
6.5
EPSS
0.05%
First published (updated )
CVE-2026-23963

MastodonMastodon vulnerable to Denial of Service from a single post (client/server)

Risk 31
Severity
7.5
EPSS
0.02%
First published (updated )
CVE-2026-23962

Joinmastodon MastodonMastodon may allow a remote suspension bypass

Risk 19
Severity
5.3
EPSS
0.05%
First published (updated )
CVE-2026-23961
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MastodonLocal Mastodon users can enumerate and access severed relationships of every other local user

Risk 27
Severity
6.5
EPSS
0.03%
First published (updated )
CVE-2026-22246

Joinmastodon MastodonMastodon has SSRF Protection bypass

Risk 31
Severity
7.5
EPSS
0.03%
First published (updated )
CVE-2026-22245

Joinmastodon MastodonMastodon Error Handling Discrepancy Enables Private Status Existence Enumeration

Risk 20
Severity
3.7
First published (updated )
CVE-2025-67500

Joinmastodon MastodonMastodon quotes control can be bypassed

Risk 22
Severity
4.3
First published (updated )
CVE-2025-62605

Joinmastodon MastodonMastodon's domain blocks & rationales ignore user approval when visibility set as "users"

Risk 19
Severity
5.3
EPSS
0.05%
First published (updated )
CVE-2025-27399
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Joinmastodon MastodonMastodon's rate-limits are missing on `/auth/setup`

Risk 19
Severity
5.3
EPSS
0.05%
First published (updated )
CVE-2025-27157

Joinmastodon MastodonLack of media type verification of Activity Streams objects allows impersonation of remote accounts

Risk 40
Severity
8.5
EPSS
0.04%
First published (updated )
CVE-2024-25623

Joinmastodon MastodonDestroying OAuth Applications doesn't notify Streaming of Access Tokens being destroyed in mastodon

Risk 16
Severity
4.3
EPSS
0.04%
First published (updated )
CVE-2024-25619

Joinmastodon MastodonExternal OpenID Connect Account Takeover by E-Mail Change in mastodon

Risk 41
Severity
7.4
EPSS
0.04%
First published (updated )
CVE-2024-25618

Joinmastodon MastodonMastodon Remote user impersonation and takeover

Risk 63
Severity
9.8
EPSS
0.10%
First published (updated )
CVE-2024-23832
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Joinmastodon MastodonMastodon's verified profile links can be formatted in a misleading way

Risk 34
Severity
5.4
First published (updated )
CVE-2023-36462

Joinmastodon MastodonMastodon vulnerable to Denial of Service through slow HTTP responses

Risk 43
Severity
7.5
First published (updated )
CVE-2023-36461

Mastodon MastodonMastodon vulnerable to arbitrary file creation through media attachments

Risk 87
Severity
10
First published (updated )
CVE-2023-36460

Mastodon MastodonMastodon vulnerable to Cross-site Scripting through oEmbed preview cards

Risk 69
Severity
9.3
First published (updated )
CVE-2023-36459

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