CVE-2026-104817

UNKNOWN 0.0

Misskey: Lack of rate limiting and size restrictions in RSS fetching API

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-405 CWE-770 CWE-918
Vendor	misskey-dev
Product	misskey
Published	Oct 13, 2026
Last Updated	Oct 13, 2026

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Affected Versions

misskey-dev / misskey

>= 12.0.0, <= 13.14.2 >= 2023.9.0-beta.1, < 2026.7.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/misskey-dev/misskey/security/advisories/GHSA-4x7v-qx8f-g3p8 github.com: https://github.com/misskey-dev/misskey/commit/a12ee2e5d72c40252e11a164b2231667c9697667 github.com: https://github.com/misskey-dev/misskey/releases/tag/2026.7.0