CVE-2026-35568 json
MCP Java-SDK has a DNS Rebinding Vulnerability
published 7mo ago modified last mo. also EUVD-2026-19954 , GHSA-8jxr-pr72-r468
- cvss
- 5.7
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
Summary
MCP Java SDK is the official Java SDK for Model Context Protocol servers and clients. Prior to 1.0.0, the java-sdk contains a DNS rebinding vulnerability. This vulnerability allows an attacker to access a locally or network-private java-sdk MCP server via a victims browser that is either local, or network adjacent. This allows an attacker to make any tool call to the server as if they were a locally running MCP connected AI agent. This vulnerability is fixed in 1.0.0.
Patch / fix
- maven io.modelcontextprotocol.sdk:mcp-core 1.0.0
- io.modelcontextprotocol.sdk mcp-core 1.0.0
- lfprojects mcp_java_sdk 1.0.0
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 7mo ago
Exploit prediction
0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.6 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 7.6 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 5.7 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | io.modelcontextprotocol.sdk:mcp-core | <1.0.0 |
1.0.0 |
Affected products
- modelcontextprotocol java-sdk
Classification
- Weakness
-
- CWE-346 Origin Validation Error
References
-
github.com
/modelcontextprotocol/java-sdk/security/advisories/GHSA-8jxr-pr72-r468
web, vendor-advisory
-
github.com
/modelcontextprotocol/java-sdk/releases/tag/v1.0.0
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-35568
advisory
-
github.com
/modelcontextprotocol/java-sdk
package
Sources
- CVE List CVE-2026-35568
- GitHub Advisory GHSA-8jxr-pr72-r468
- NVD CVE-2026-35568
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.