What is CVE-2026-12606?

CVE-2026-12606 is a medium-severity vulnerability in Eclipse Grizzly, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 5.3/10. Published 2026-07-14.

How severe is CVE-2026-12606?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Eclipse Grizzly

CVE-2026-12606

Eclipse Grizzly in versions before 5.0.2, cannot properly parse the trailer section in malformed trailer header's line, which can be leveraged to perform HTTP request smuggling.

Vulnerability class: HTTP Request Smuggling

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Eclipse Grizzly
Eclipse Foundation Glassfish — versions 4.0.0, 5.0.0

Weakness classification (CWE)

CWE-444 — Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling)

References

emo@eclipse.org (Issue Tracking)

Frequently asked questions

What is CVE-2026-12606?: CVE-2026-12606 is a medium-severity vulnerability in Eclipse Grizzly, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 5.3/10. Published 2026-07-14.
How severe is CVE-2026-12606?: Medium severity. CVSS v3 base score is 5.3 out of 10.