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CVE-2026-42188

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c1318d200b09c75a7e3c33ace24f77caa48b6d5bb1ac7ab50df321dac5003418
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"Geyser","vendor":"GeyserMC","versions":[{"status":"affected","version":"< 2.9.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d83c2da0d0dfa0f99de3df107848f36f01078878b94e4b8df58318daa049c7fe · sha256:e9fb2a73d8f692a6… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":2.4,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d83c2da0d0dfa0f99de3df107848f36f01078878b94e4b8df58318daa049c7fe · sha256:e9fb2a73d8f692a6… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d83c2da0d0dfa0f99de3df107848f36f01078878b94e4b8df58318daa049c7fe · sha256:e9fb2a73d8f692a6… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/GeyserMC/Geyser/security/advisories/GHSA-xcfg-fcr5-gw9r"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d83c2da0d0dfa0f99de3df107848f36f01078878b94e4b8df58318daa049c7fe · sha256:e9fb2a73d8f692a6… · /containers/adp/0/references/0
{"name":"https://github.com/GeyserMC/Geyser/security/advisories/GHSA-xcfg-fcr5-gw9r","tags":["x_refsource_CONFIRM"],"url":"https://github.com/GeyserMC/Geyser/security/advisories/GHSA-xcfg-fcr5-gw9r"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d83c2da0d0dfa0f99de3df107848f36f01078878b94e4b8df58318daa049c7fe · sha256:e9fb2a73d8f692a6… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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