CVE-2026-34460
MEDIUMDescription
NamelessMC is website software for Minecraft servers. In versions 2.2.4 and prior, the OAuth callback handling does not validate the state parameter server-side before exchanging the authorization code. This allows an attacker to capture a valid OAuth callback URL for their own account and cause a victim's browser to navigate to it, resulting in the victim's session being authenticated as the attacker-linked account (OAuth login CSRF / session swapping). This is patched in version 2.2.5.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 2% of all known CVEs.
References
Related Vulnerabilities
Other CWE-302 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-43441 | Critical | 9.8 | 70% | - | Fix |
| CVE-2024-4024 | High | 7.3 | 15% | - | Fix |
| CVE-2016-9482 | Critical | 9.8 | 4.7% | - | - |
| CVE-2025-29813 | Critical | 10.0 | 1.7% | - | - |
| CVE-2020-15074 | High | 7.5 | 1.0% | - | Fix |
| CVE-2024-49056 | High | 7.3 | 1.0% | - | - |
Common questions
How do I fix CVE-2026-34460?
No published fix for CVE-2026-34460 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-34460 being actively exploited?
Not that we know of. CVE-2026-34460 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.11% is the estimated probability that it will be exploited in the next 30 days. That is higher than 2% of all scored CVEs.
How severe is CVE-2026-34460?
CVE-2026-34460 has a CVSS v3 base score of 5.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-22.