CVE-2026-22245 Mastodon has SSRF Protection bypass

Mastodon is a free, open-source social network server based on ActivityPub. By nature, Mastodon performs a lot of outbound requests to user-provided domains. Mastodon, however, has some protection mechanism to disallow requests to local IP addresses unless specified in ALLOWEDPRIVATEADDRESSES to...

PT-2026-2181

Name of the Vulnerable Software and Affected Versions Mastodon versions 4.2.29, 4.3.17, 4.4.11, and 4.5.4 Description Mastodon is a social network server that makes outbound requests to user-provided domains. A protection mechanism exists to disallow requests to local IP addresses, intended to...

Mastodon 代码问题漏洞

Mastodon is an open source social networking server based on ActivityPub by Mastodon Open Source. A code issue vulnerability exists in Mastodon versions prior to 4.5.4, prior to 4.4.11, prior to 4.3.17, and prior to 4.2.29, which stems from the lack of an IP address range restriction that could...

Mastodon 安全漏洞

Mastodon is an open source social networking server based on ActivityPub by Mastodon Open Source. A security vulnerability exists in Mastodon versions prior to 4.3.17, prior to 4.4.11, and prior to 4.5.4, which stems from a lack of relationship list ownership checking and could lead to informatio...

PT-2026-2182

Name of the Vulnerable Software and Affected Versions Mastodon versions 4.3 through 4.3.16 Mastodon versions 4.4 through 4.4.10 Mastodon versions 4.5 through 4.5.3 Description Mastodon is a free, open-source social network server based on ActivityPub. A flaw exists in the code handling the downlo...

CVE-2025-14346

creationtimestamp| type| source ---|---|--- 2026-01-05 16:51:56+00:00| seen| https://bsky.app/profile/thehackerwire.bsky.social/post/3mbovkacx7t2m 2026-01-05 17:01:58+00:00| published-proof-of-concept| Telegram/JG0illfmG2L7l4ptINREGxlmvgbv5gaPTQ3AaWMoCQe-I 2026-01-05 17:03:39+00:00| seen|...

GHSA-84H7-RJJ3-6JX4

creationtimestamp| type| source ---|---|--- 2025-12-15 17:55:01+00:00| seen| https://mastodon.social/users/chrisvest/statuses/115724864576648010...

CVE-2025-67735

creationtimestamp| type| source ---|---|--- 2025-12-15 14:39:48+00:00| published-proof-of-concept| https://github.com/netty/netty/security/advisories/GHSA-84h7-rjj3-6jx4 2025-12-15 17:55:00+00:00| seen| https://mastodon.social/users/chrisvest/statuses/115724864576648010 2026-01-13 15:10:13+00:00|...

CVE-2025-67500

Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0-beta.1 through 4.3.14, 4.4.0-beta.1 through 4.4.9, 4.5.0-beta.1 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request...

BIT-MASTODON-2025-67500 Mastodon Error Handling Discrepancy Enables Private Status Existence Enumeration

Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0 through 4.3.14, 4.4.0 through 4.4.9, 4.5.0 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request with a non-English...

CVE-2025-67500

Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0-beta.1 through 4.3.14, 4.4.0-beta.1 through 4.4.9, 4.5.0-beta.1 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request...

Mastodon 安全漏洞

Mastodon is an open source social networking server based on ActivityPub by Mastodon Open Source. A security vulnerability exists in Mastodon that stems from inconsistent error handling and could lead to an existential disclosure of state. The following versions are affected: version 4.2.27 and...

CVE-2025-67500 Mastodon Error Handling Discrepancy Enables Private Status Existence Enumeration

Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0-beta.1 through 4.3.14, 4.4.0-beta.1 through 4.4.9, 4.5.0-beta.1 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request...

CVE-2025-67500 Mastodon Error Handling Discrepancy Enables Private Status Existence Enumeration

Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0-beta.1 through 4.3.14, 4.4.0-beta.1 through 4.4.9, 4.5.0-beta.1 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request...

CVE-2025-67500

CVE-2025-67500 affects Mastodon prior to fixed versions: 4.2.28, 4.3.15, 4.4.10 and 4.5.3. The issue stems from error-handling discrepancies that let an attacker determine whether a private status exists by sending a request with a non-English Accept-Language header; it does not reveal the status...

CVE-2025-67500 Mastodon Error Handling Discrepancy Enables Private Status Existence Enumeration

Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0-beta.1 through 4.3.14, 4.4.0-beta.1 through 4.4.9, 4.5.0-beta.1 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request...

PT-2025-50292

Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0-beta.1 through 4.3.14, 4.4.0-beta.1 through 4.4.9, 4.5.0-beta.1 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request...

CVE-2025-55183

creationtimestamp| type| source ---|---|--- 2025-12-05 13:54:28+00:00| seen| https://vulnerability.circl.lu/bundle/6739b288-995a-4f1a-9f03-5d1ced3a8fbd 2025-12-11 20:51:04+00:00| seen| https://bsky.app/profile/react.dev/post/3m7qhaqdtxc2v 2025-12-11 20:51:05+00:00| seen|...

CVE-2025-55184

creationtimestamp| type| source ---|---|--- 2025-12-05 13:54:28+00:00| seen| https://vulnerability.circl.lu/bundle/6739b288-995a-4f1a-9f03-5d1ced3a8fbd 2025-12-11 20:51:04+00:00| seen| https://bsky.app/profile/react.dev/post/3m7qhaqdxuc2v 2025-12-11 20:51:04+00:00| seen|...

CVE-2025-51539

creationtimestamp| type| source ---|---|--- 2025-12-05 08:00:05+00:00| seen| https://mastodon.social/users/leakix/statuses/115665902080740299 2025-12-05 08:00:06+00:00| seen| https://bsky.app/profile/leakix.bsky.social/post/3m77zelsopt2x...