CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

SUSE CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

Denial-of-Service (DoS)

Synapse is vulnerable to a Denial-Of-Service. The vulnerability is due to improper handling of maliciously crafted federation events, where a malicious Matrix server can send crafted events that prevent Synapse from federating with other servers...

GHSA-V56R-HWV5-MXG6 Synapse vulnerable to federation denial of service via malformed events

Impact A malicious server can craft events with a depth outside the integer range allowed by Canonical JSON. When such an event is received by Synapse version up to 1.127.0, it prevents it from federating with other servers. The vulnerability has been exploited in the wild. Patches Fixed in Synap...

Improper Input Validation

Overview matrix-synapse is an ecosystem for open federated Instant Messaging and VoIP. Affected versions of this package are vulnerable to Improper Input Validation. A malicious server can disrupt the normal operation and prevent the application from federating with other servers by crafting even...

CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

DEBIAN-CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

UBUNTU-CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

CVE-2025-30355 Synapse vulnerable to federation denial of service via malformed events

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

Element Synapse 输入验证错误漏洞

Element Synapse is an open source Matrix Home Server implementation from Element Open Source. An input validation error vulnerability exists in Element Synapse version 1.127.0 and earlier, which stems from a malicious server that can prevent federation with other servers...

CVE-2025-30355: Improper Input Validation

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

PT-2025-13021

Name of the Vulnerable Software and Affected Versions Synapse versions prior to 1.127.1 Description The issue allows a malicious server to craft events that prevent Synapse from federating with other servers. The vulnerability has been exploited in the wild. Recommendations For versions prior to...

py-matrix-synapse -- federation denial of service via malformed events

element-hq/synapse developers report: A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild...

VulnCheck KEV: CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

CVE-2025-27097: Uncontrolled Resource Consumption

GraphQL Mesh is a GraphQL Federation framework and gateway for both GraphQL Federation and non-GraphQL Federation subgraphs, non-GraphQL services, such as REST and gRPC, and also databases such as MongoDB, MySQL, and PostgreSQL. When a user transforms on the root level or single source with...

IBM Security Verify Access Authorization Issues Vulnerability

IBM Security Verify Access ISAM is a service from International Business Machines IBM that improves user access security. The service enables secure and simple access to platforms such as web, mobile, IoT and cloud technologies through the use of risk-based access, single sign-on, integrated acce...

The vulnerability of the verify_url_valid() function in the Activitypub-Federation framework, a platform for creating and managing communities in the Lemmy ecosystem, allows attackers to circumvent security restrictions and gain unauthorized access to protected information.

The vulnerability of the verifyurlvalid function in the Activitypub-Federation framework, a platform for creating and managing communities in the Lemmy community, is related to insufficient validation of requests on the server side. Exploiting this vulnerability could allow an attacker to bypass...

CVE-2025-25194

Lemmy, a link aggregator and forum for the fediverse, is vulnerable to server-side request forgery via a dependency on activitypubfederation, a framework for ActivityPub federation in Rust. This vulnerability, which is present in versions 0.6.2 and prior of activitypubfederation and versions 0.19...

CVE-2025-25194 Server-Side Request Forgery (SSRF) in activitypub_federation

Lemmy, a link aggregator and forum for the fediverse, is vulnerable to server-side request forgery via a dependency on activitypubfederation, a framework for ActivityPub federation in Rust. This vulnerability, which is present in versions 0.6.2 and prior of activitypubfederation and versions 0.19...

CVE-2025-25194

CVE-2025-25194 describes a Server-Side Request Forgery (SSRF) in Lemmy linked to the activitypub_federation Rust library. The vulnerability allows an attacker to craft a Webfinger-based request that may bypass hardcoded URL/path restrictions and trigger an arbitrary GET to any Host, Port, and URL...