Home / Vulnerability Intelligence / CVE-2026-33868

CVE-2026-33868 - Vulnerability Analysis

MediumCVSS: 4.3

Last Updated: March 27, 2026

Mastodon - Open Redirect

Published: March 27, 2026Updated: March 27, 2026PoC AvailableRemote Exploitable

Overview

Mastodon versions < 4.5.8, < 4.4.15, and < 4.3.21 contain an Open Redirect vulnerability in the /web/* route due to improper handling of URL-encoded path segments, allowing unauthenticated attackers to redirect users.

Severity & Score

Severity: Medium

CVSS Score: 4.3

Impact

Redirect users to external domain.

Mitigation

Update Mastodon to versions 4.5.8, 4.4.15, 4.3.21.

References

https://github.com/mastodon/mastodon/security/advisories/GHSA-xqw8-4j56-5hj6
https://nvd.nist.gov/vuln/detail/CVE-2026-33868

Related Resources

Vulnerability Intelligence Dashboard
Credential Scanner

Details

CVE ID: CVE-2026-33868
Severity: Medium
CVSS Score: 4.3
Type: open_redirect
Status: new

CWE

CWE-601

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N