CVE-2026-12606

MEDIUM
Published Jul 14, 2026 Modified Jul 14, 2026 CWE-444

Description

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.

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CVSS v3.1 Score

5.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

0.0019
Probability of exploitation
0.09%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-444 CWE-444

Affected Products

Vendor Product
eclipse grizzly
eclipse grizzly

References

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2026-12606? +
CVE-2026-12606 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0019, placing it in the 0th percentile for exploitation probability.
What products are affected by CVE-2026-12606? +
CVE-2026-12606 affects products from eclipse, specifically: grizzly. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-12606? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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