HOMEVULNERABILITIESCVE-2026-42188
LOW

CVE-2026-42188

CWE-918Published: May 11, 2026· Updated: May 13, 2026

2.4
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:6.7th

Official Description

Geyser is a bridge between Minecraft: Bedrock Edition and Minecraft: Java Edition. Prior to 2.9.3, a server-side request forgery (SSRF) vulnerability exists in Geyser’s handling of Bedrock player head texture data. By supplying a crafted Base64-encoded skin texture URL via the /give command, an attacker can cause the Minecraft server to issue arbitrary HTTP GET requests to attacker-controlled or internal endpoints. This occurs server-side, without proper URL validation, and can be triggered by a Bedrock client. This vulnerability is fixed in 2.9.3.

NVD Source

Technical Analysis

CVE-2026-42188 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.High
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N

Affected Vendors & Products

Mentioned vendors (from description):
Java
CPE data not yet available in NVD for this CVE.

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

All References (2)

→
https://github.com/GeyserMC/Geyser/security/advisories/GHSA-xcfg-fcr5-gw9r
→
https://github.com/GeyserMC/Geyser/security/advisories/GHSA-xcfg-fcr5-gw9r

Quick Facts

CVE IDCVE-2026-42188
CVSS Score2.4 / 10
SeverityLOW
WeaknessCWE-918
CISA KEVNo
EPSS (30d)0.02%
PublishedMay 11, 2026

Related CVEs (CWE-918)

CVE-2026-26150
10.0
CVE-2026-26138
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CVE-2026-32871
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CVE-2026-35431
10.0
CVE-2026-32169
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CVE-2026-13773
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Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-42188 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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