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TI-2026-26725 Aliases CVE-2026-34460

NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping

Priority MEDIUM 58CWE-302Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-346 and CWE-352.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00114 1st percentileScored 2026-11-07
Fix Fixed Nameless (NamelessMC): 2.2.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NamelessMCNamelessbefore 2.2.52.2.5Patch availableCNA
  • Nameless VendorNamelessMC Affected before 2.2.5 Fixed in 2.2.5 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:namelessmc:nameless:*:*:*:*:*:*:*:*——NamelessMC
  • cpe:2.3:a:namelessmc:nameless:*:*:*:*:*:*:*:* Versions — — ·NamelessMC

Remediation

  • Fix · CNA Nameless (NamelessMC) Fixed in 2.2.5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34460

References

Other 1

  • TI-2025-16092 Account Takeover in NamelessMC CVSS 4.0CRITICAL 9.0
  • TI-2025-33960 NamelessMC allows Stored Cross-Site Scripting (XSS) in dashboard text editor CVSS 3.1CRITICAL 9.1
  • TI-2025-23467 NamelessMC Vulnerable to SQL Injections in /user/messaging and /panel/users/reports Pages CVSS 4.0HIGH 8.6
  • TI-2025-21195 NamelessMC Has Lack of Length Validation for s Parameter in GET Requests CVSS 3.1HIGH 7.5
  • TI-2026-29091 NamelessMC: Reactions on private or blocking profile posts can be read and modified without proper authorization CVSS 4.0MEDIUM 6.9
  • TI-2022-02614 Session Fixation in namelessmc/nameless CVSS 3.1HIGH 8.2
See all 19 →

Sources

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