CVE-2026-104817: Misskey: Lack of rate limiting and size restrictions in RSS fetching API
misskey-dev · misskey
Affected: misskey-dev · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 40% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- misskey-dev · misskey>= 12.0.0, <= 13.14.2; >= 2023.9.0-beta.1, < 2026.7.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- misskey-dev
- Published
- October 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-104817 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.