How severe is CVE-2026-50287?

CVE-2026-50287 has a CVSS 4.0 base score of 8.7, rated high severity.

Is CVE-2026-50287 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-50287?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-50287 have an EU (EUVD) identifier?

Yes. CVE-2026-50287 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36544.

When was CVE-2026-50287 published?

CVE-2026-50287 was published on 2026-06-12 and last updated on 2026-06-17.

CVE-2026-50287

CVE-2026-50287 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: High (CVSS 4.0 base score 8.7)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36544
Weakness: CWE-306
Published: 2026-06-12
Last modified: 2026-06-17

Description

AgenticMail gives AI agents real email addresses and phone numbers. Prior to version 0.9.27, @agenticmail/mcp exposes a Streamable HTTP transport when started with --http or MCP_HTTP=1. In that mode, the /mcp endpoint accepts requests without any HTTP authentication layer. A remote client can initialize a session and call tools directly. This issue has been patched in version 0.9.27.

Frequently asked questions

What is CVE-2026-50287?: AgenticMail gives AI agents real email addresses and phone numbers. Prior to version 0.9.27, @agenticmail/mcp exposes a Streamable HTTP transport when started with --http or MCP_HTTP=1. In that mode, the /mcp endpoint accepts requests without any HTTP authentication layer. A remote client can initialize a session and call tools directly. This issue has been patched in version 0.9.27.
How severe is CVE-2026-50287?: CVE-2026-50287 has a CVSS 4.0 base score of 8.7, rated high severity.
Is CVE-2026-50287 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-50287?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-50287 have an EU (EUVD) identifier?: Yes. CVE-2026-50287 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36544.
When was CVE-2026-50287 published?: CVE-2026-50287 was published on 2026-06-12 and last updated on 2026-06-17.

References

https://github.com/agenticmail/agenticmail/security/advisories/GHSA-63gr-g7jc-v8rg

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