Description
Misskey is an open source, federated social media platform. From 12.112.1 until 2026.7.0, the unauthenticated fetch-rss API lacks rate limiting and response-size restrictions and performs synchronous XML parsing. An attacker can trigger unbounded outbound HTTP requests and synchronous parsing, exhausting instance resources, amplifying requests toward third-party servers, or probing network-reachable services even when federation is disabled. This issue is fixed in version 2026.7.0.
Published: 2026-10-13
Score: 8.7 High
EPSS: n/a
KEV: No
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Remediation

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Tracking

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History

Tue, 13 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 13 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
Description Misskey is an open source, federated social media platform. From 12.112.1 until 2026.7.0, the unauthenticated fetch-rss API lacks rate limiting and response-size restrictions and performs synchronous XML parsing. An attacker can trigger unbounded outbound HTTP requests and synchronous parsing, exhausting instance resources, amplifying requests toward third-party servers, or probing network-reachable services even when federation is disabled. This issue is fixed in version 2026.7.0.
Title Misskey: Lack of rate limiting and size restrictions in RSS fetching API
Weaknesses CWE-405
CWE-770
CWE-918
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:L/SI:N/SA:L'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-13T19:04:03.012Z

Reserved: 2026-10-02T14:17:09.334Z

Link: CVE-2026-104817

cve-icon Vulnrichment

Updated: 2026-10-13T19:03:58.299Z

cve-icon NVD

Status : Received

Published: 2026-10-13T19:17:55.697

Modified: 2026-10-13T19:17:55.697

Link: CVE-2026-104817

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-405

    Asymmetric Resource Consumption (Amplification)

  • CWE-770

    Allocation of Resources Without Limits or Throttling

  • CWE-918

    Server-Side Request Forgery (SSRF)