CVE-2026-35568: MCP Java SDK is the official Java SDK for Model Context Protocol servers and clients

Q: How do I fix CVE-2026-35568?

mcp java sdk: upgrade to 1.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-35568 being exploited?

CVE-2026-35568 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-35568 affect?

CVE-2026-35568 affects mcp java sdk. Severity is medium (CVSS 5.7). 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

Q: How urgent is CVE-2026-35568?

Priority 21/100. No elevated risk signals yet.

Routine

MEDIUM 5.7UPGRADE

CVE-2026-35568 is a medium-severity flaw (CVSS 5.7) affecting mcp java sdk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 vulnerabil

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.7 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-346
Published	2026-04-07
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: lfprojects

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-07 22:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

lfprojects mcp java sdk UPGRADE

Affected: < 1.0.0

Fixed in: 1.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mcp-java-sdk || rpm -q mcp-java-sdk || mcp-java-sdk --version

2. UPGRADE to 1.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mcp-java-sdk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mcp-java-sdk

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-35568?

mcp java sdk: upgrade to 1.0.0. Exact commands for each OS are on this page.

Is CVE-2026-35568 being exploited?

CVE-2026-35568 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-35568 affect?

CVE-2026-35568 affects mcp java sdk. Severity is medium (CVSS 5.7). 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

How urgent is CVE-2026-35568?

Priority 21/100. No elevated risk signals yet.

Software pages

Java vulnerabilities

References

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