TI-2023-26744 Aliases CVE-2023-49079

Misskey's missing signature validation allows arbitrary users to impersonate any remote user.

MEDIUM 40CWE-347Published 2023-11-29 · Updated 2024-08-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: Low · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-347.

Summary

Misskey is an open source, decentralized social media platform. Misskey's missing signature validation allows arbitrary users to impersonate any remote user. This issue has been patched in version 2023.11.1-beta.1.

Why it matters now

EPSS 0.004 34th percentileScored 2026-11-07

Fix Fixed misskey (misskey-dev): 2023.11.1-beta.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
misskey-dev	misskey	before 2023.11.1-beta.1	2023.11.1-beta.1	Patch available	CNA

misskey Vendormisskey-dev Affected before 2023.11.1-beta.1 Fixed in 2023.11.1-beta.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:misskey:misskey::::::::	before 2023.11.1	Vulnerable	misskey-dev

cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:* Versions before 2023.11.1 Vulnerable ·misskey-dev

Remediation

Fix · CNA misskey (misskey-dev) Fixed in 2023.11.1-beta.1

Timeline

2026-10-02 Threatist record created from CVE-2023-49079

References

Advisory 1

https://github.com/misskey-dev/misskey/security/advisories/GHSA-3f39-6537-3cgc

TI-2025-18599 Misskey CSRF vulnerability due to insecure configuration of authentication cookie attributes CVSS 3.1HIGH 8.2
TI-2025-29081 Misskey CSS Style Injection Vulnerability In `MkUrlPreview` CVSS 3.1HIGH 7.2
TI-2025-40906 Misskey has a login rate limit bypass via spoofed X-Forwarded-For header CVSS 4.0MEDIUM 6.9
TI-2025-29276 Misskey Directory Traversal Vulnerability in AiScript via `Mk:api` CVSS 3.1HIGH 7.5
TI-2025-40839 misskey.js's export data contains private post data CVSS 4.0HIGH 7.1
TI-2026-22705 Misskey lacks proper authorization checks and input validation CVSS 4.0CRITICAL 9.2

See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences