CVEvulnerability

CVE-2026-104817

8.7 HIGH Published 2026-10-13 Modified 2026-10-16 Official page ↗
Status
Deferred
Published
2026-10-13
Last modified
2026-10-16
Assigner
[email protected]
CVSS 4.0 ([email protected])
8.7 HIGH — 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weaknesses
CWE-405, CWE-770, CWE-918

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.

Related

Weakness · CWE (3)

  • CWE-405 Asymmetric Resource Consumption (Amplification) weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling weakness
  • CWE-918 Server-Side Request Forgery weakness

References