What is CVE-2026-15076?

CVE-2026-15076 is a high-severity vulnerability in Eclipse Vert.x, classified under Origin Validation Error. CVSS score: 7.5/10. Published 2026-07-14.

How severe is CVE-2026-15076?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Eclipse Vert.x

CVE-2026-15076

In versions up to and including 4.5.29 (4.x branch) and 5.1.4 (5.x branch), the WebClientSession component of Eclipse Vert.x Web Client does not validate that the Domain attribute of a Set-Cookie response header matches the originating ser…

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Eclipse Vert.x
Eclipse Foundation Vert.x — versions 4.0.0, 5.0.0

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

emo@eclipse.org (Issue Tracking)

Frequently asked questions

What is CVE-2026-15076?: CVE-2026-15076 is a high-severity vulnerability in Eclipse Vert.x, classified under Origin Validation Error. CVSS score: 7.5/10. Published 2026-07-14.
How severe is CVE-2026-15076?: High severity. CVSS v3 base score is 7.5 out of 10.